I.
Defendant was arrested in Raleigh on 27 July 1980 for the sale and delivery of the controlled substance methaqualone and for possession with intent to sell and deliver the controlled substance methaqualone. Counsel was appointed to represent defendant and his co-defendant, Laurence Edward Whittis, but in early August they retained private counsel, Daniel Work. Defendant agreed to waive venue on 12 August 1980 and the case was transferred to Carteret County on 26 August 1980.
Although defendant was originally indicted for possession with intent to sell and sale of methaqualone, subsequent laboratory tests indicated that the substance in the tablets allegedly sold by defendant was diazepam, also a controlled substance. On 17 November 1980 new indictments were returned which charged defendant with possession and sale of diazepam. These indictments were issued on 17 November 1980 and were served on defendant on 20 November 1980. On 19 November, Mr. Work appeared before the court and requested that he be allowed to withdraw as counsel for the defendant because of a conflict of interest. Judge DeRamus granted the motion to withdraw. On that same day, Allen King, an associate of Reginald Frazier, defendant’s trial counsel, appeared before Judge DeRamus and in*546formed him that Frazier had been retained to represent defendant. At that time Work reportedly told the judge that he had the case ready for trial and that he would assist Frazier in preparing for trial. King was told by the prosecutor, George Beswick, on Thursday, 20 November, that that the case would be called for trial on Monday, 24 November. King advised the court that Frazier was involved in a rape trial in Camp Lejeune which was expected to last the rest of that week and part of the next. He moved for a continuance and the motion was denied.
The case was called for trial on 24 November 1980 and Frazier, appearing for defendant, moved for a continuance on the grounds of lack of time for adequate preparation and of his involvement in a trial in progress in federal court. He told Judge Barefoot that he had been unable to prepare the case and had not even talked with defendant. The judge denied the motion to continue, and Frazier moved to be permitted to withdraw. This motion was likewise denied. A colloquy among the court, the district attorney and Fraizer then ensued. Frazier advised the court, “I can say I am totally unprepared to render to this defendant competent, effective assistance of counsel.” Judge Barefoot then advised Frazier, “I will give you 15 minutes to talk to him, but we will try him in 15 minutes.” The court then recessed for fifteen minutes and the case proceeded to trial.
The jury returned verdicts of guilty of possession with intent to sell and deliver diazepam and of sale and delivery of diazepam. Defendant was sentenced to three to four years’ imprisonment for possession and was given a consecutive sentence of three to four years’ imprisonment for the sale and delivery.
Defendant appealed to the Court of Appeals. That court, in an opinion by Chief Judge Morris in which Judges Hedrick and Wells concurred, found no error. Defendant gave notice of appeal to this Court on the basis of a substantial constitutional question pursuant to G.S. 7A-30(1) and alternatively petitioned our discretionary reivew pursuant to G.S. 7A-31. The Attorney General moved to dismiss the appeal on the ground that no substantial constitutional question was presented. On 14 January 1982, we allowed defendant’s petition for discretionary review and denied the Attorney General’s motion to dismiss.
*547II.
The question dispositive of this appeal is this: Under the facts of this case, did the trial court’s denial of defendant’s motion for a continuance operate to deprive defendant of his constitutional right to effective assistance of counsel? To answer the issue so posited, we must determine whether, because of the refusal to allow a continuance, defendant’s attorney had adequate time to investigate, prepare and present a defense. The issue is not as incorrectly assumed by the Court of Appeals, whether defendant actually suffered prejudice by virtue of defense counsel’s performance at trial. We are here concerned with the relationship between defendant’s sixth amendment guarantee of effective assistance of counsel of his own choosing and the implicit constitutional guarantee that an accused and his counsel shall have a reasonable time to investigate, prepare and present defendant’s defense. We have previously addressed this bifocal constitutional guarantee in State v. McFadden, 292 N.C. 609, 234 S.E. 2d 742 (1977), and find that decision controlling here.
Although a motion for a continuance is ordinarily addressed to the discretion of the trial judge and is reviewable only upon a showing of an abuse of discretion, when the motion is based on a constitutional right the ruling of the trial judge is reviewable on appeal as a question of law. E.g., State v. McFadden, 292 N.C. 609, 234 S.E. 2d 742. Defendant’s motion for a continuance in this case was based on his constitutional right to effective assistance of counsel and, thus, is fully reviewable as a question of law.
Defendant’s claim here is based not on his attorney’s competency or performance at trial, but on the adequacy of the time given his attorney to prepare for trial. The record discloses the relevant circumstances to be these: Defendant’s privately retained counsel, Daniel Work, who had prepared the case for trial, withdrew as defendant’s attorney four days prior to trial. Frazier was retained by defendant and entered an appearance in the case through his associate, Allen King, on that same day. The court was informed that Frazier was then trying a case in federal court which was expected to last into the next week. On Monday, 24 November, Frazier appeared with defendant for the first time. He stated to the court that he had been unable to prepare the case for trial due to the shortness of time and his involvement in *548another trial. Frazier told the court that the only information he knew about the case had come from Work and involved a plea bargain arrangement, the terms of which he did not understand. Frazier was given fifteen minutes to confer with defendant and the trial began.
As stated by Justice (now Chief Justice) Branch in McFadden,
It is implicit in the constitutional guarantees of assistance of counsel and confrontation of one’s accusers and witnesses against him that an accused and his counsel shall have a reasonable time to investigate, prepare and present his defense. However, no set length of time is guaranteed and whether defendant is denied due process must be determined under the circumstances of each case.
292 N.C. at 616, 234 S.E. 2d at 747. In McFadden, defendant had retained private counsel, Mr. Powell, who had investigated and prepared the case for trial. On the morning of the trial, Powell’s associate, Mr. Parrish, appeared and informed the court that Powell was engaged in another trial. The court denied defendant’s motion for a continuance and directed Parrish to represent defendant. In granting defendant a new trial, this Court stated:
In instant case defendant, who was charged with a felony, met and talked with Mr. Parrish for the first time about ninety minutes before the case was called for trial. Mr. Parrish had practiced law for eighteen months and had previously tried only one jury case. He knew nothing about this case until he arrived in court. All of the preliminary hearings and preparations for trial had been handled exclusively by Mr. Powell. Defendant indicated to Mr. Parrish on the day of the trial that he wanted his retained counsel to represent him. Under these circumstances defendant was denied effective assistance of counsel because he and Mr. Parrish did not have a reasonable time in which to prepare and present a defense.
Id. Although the circumstances of this case are somewhat different from McFadden in that defendant here was in fact represented by the attorney he chose to represent him, the remaining factors are remarkably similar. The attorney who *549represented the defendant at trial, both here and in McFadden, had not prepared the case, had not met with the defendant prior to the morning of trial, and was given little time in which to prepare a defense. Counsel in McFadden talked with the defendant for ninety minutes prior to the trial; counsel here was given fifteen minutes. Under these circumstances, where counsel is retained only four days prior to trial through no fault of defendant’s, is concurrently involved in another trial, and is allowed only a few minutes to confer with his client prior to trial, failure of the trial court to grant a continuance denied defendant effective assistance of counsel.
The Court of Appeals rejected defendant’s constitutional claim because he failed to show that the denial of his continuance motion resulted in prejudice. In support of this holding the court cited State v. Robinson, 283 N.C. 71, 194 S.E. 2d 811 (1973), and State v. Moses, 272 N.C. 509, 158 S.E. 2d 617 (1968) (per curiam). These cases do indeed hold that defendant must prove both error and prejudice in the denial of his continuance motion in order to entitle him to a new trial. The prejudice which must be shown, according to the Court of Appeals’ opinion, is that the trial was a “farce and mockery of justice.”1 See State v. Sneed, 284 N.C. 606, 201 S.E. 2d 867 (1974). In Sneed defendant claimed that his attorney was so incompetent as to render his assistance ineffective and, in order to show that he had been denied the right to counsel, he, of necessity, had to prove that the trial was a farce and mockery of justice. In other words, this defendant had to prove the prejudice, the farce and mockery, in order to prove the claim of ineffective assistance of counsel. In Moses, defendant made only a general constitutional challenge to the denial of his motion for continuance, and the Robinson facts indicated that defense counsel had had an adequate time to prepare for trial. Moreover, Robinson asked for the continuance on the ground that he wanted to be tried before a different judge and no need for additional time to prepare for trial was mentioned. Defendant here *550does not claim that his attorney was incompetent, but that the attorney was given inadequate time to prepare for trial. Once the inadequacy of time to prepare is shown, prejudice from the denial of his constitutional right is presumed under G.S. 15A-1443(b), and the burden falls on the State to show beyond a reasonable doubt that the error was harmless. The State has not done so here.
The Court of Appeals erred in addressing this appeal as though it involved the traditional claim of ineffective assistance of counsel by virtue of inadequate performance of counsel at trial. Unquestionably, prejudice to defendant resulting from counsel’s performance at trial must be shown by defendant in that instance. Here, however, the questions are altogether different. Neither performance of counsel at trial nor any resulting prejudice to defendant are relevant. Under the authority of McFadden, a defendant’s constitutional right to effective assistance of counsel implicitly guarantees defendant, as a matter of law, the right for him and his attorney to have adequate time to prepare a defense. In this instance, the error occurs before the trial even begins. Prejudice is presumed because no one can be certain how trial counsel might have been able to perform if he had had adequate time to perpare for trial. Thus, failure of the trial court to grant a motion to continue which is essential to allowing adequate time for trial preparation, unless the State can prove the absence of prejudice, operates to deny defendant his right to effective assistance of counsel.
In light of the foregoing, we wish to make it abundantly clear that we offer no opinion on Mr. Frazier’s performance at trial or on the propriety of his alleged conflict with a trial in another court. The trial court made no findings of fact with respect to the latter and we are bound by the record before us. The record discloses that Mr. Frazier was retained four days prior to this defendant’s trial (a Saturday and Sunday included) while he was appearing as counsel in a trial in another court and that he was allowed to consult with defendant for only fifteen minutes prior to the trial of a case with which he was unfamiliar.
Nor is this Court inadvertent to Mr. Frazier’s reputation for utilizing delaying tactics in the trial courts in the past. Again, however, we are bound by the facts revealed in the record before us now. As noted in McFadden,
*551The record does not disclose that [defendant] had in any way contributed to his counsel’s absence. The fact that his counsel had accepted other employment which prevented his presence at the trial cannot be charged to defendant so as to deny him his constitutional right to counsel of his own choice. We find nothing in this record that indicates that defendant exercised his right to select counsel of his choice in a manner calculated to disrupt or obstruct the orderly progress of the court.
292 N.C. at 615, 234 S.E. 2d at 746-47.
So it is here. While this defendant did have the benefit of his chosen counsel at trial, he was clearly denied the right to adequate time for him and his counsel to prepare for trial. There is nothing in this record to indicate that defendant chose Mr. Frazier in order to obstruct the orderly progress of the court.
We also wish to reiterate Chief Justice Branch’s admonition in McFadden:
We wish to make it abundantly clear that we do not approve of tactics by counsel or client which tend to delay the trial of cases. . . . The judiciary possesses powers to regulate and discipline attorneys who deliberately or negligently impede the progress of our courts. Likewise an accused may lose his constitutional right to be represented by counsel of his choice when he perverts that right to a weapon for the purpose of obstructing and delaying his trial. It might well be said that defendant’s chosen counsel acted improvidently in that he did not consult the trial judge concerning a continuance, or in that ... he did not take steps to prepare [an associate] for the trial of the case and consult defendant as to the possibility that his associate might proceed with the trial in the event that a continuance was not obtained. However, any fault of counsel without defendant’s concurrence cannot be imputed to defendant so as to preclude him from obtaining counsel of his choice.
292 N.C. at 616, 234 S.E. 2d at 747 (emphasis added).
Defendant also contends that certain comments made by the district attorney during the closing argument amounted to an im*552permissible comment on his fifth amendment right to remain silent. Because these comments may not be repeated on retrial, we do not address this contention.
In summary, we find that the trial court’s denial of defendant’s motion for a continuance infringed upon defendant’s constitutional right to effective assistance of counsel and that he is entitled to a new trial on both charges. The decision of the Court of Appeals is reversed and the cause is remanded to that court with instructions to remand to the Superior Court, Carteret County, for a new trial.
Reversed and remanded.
Justice MITCHELL concurs in the result.