[1] Defendant contends that the trial judge erred by permitting the district attorney to ask leading questions.
*401During the direct examination of the witness Lois Cohen, the district attorney directed her to “relate all of the events as you best recall them.” The trial judge overruled defendant’s objection, and Mrs. Cohen related, “We saw a woman in the driveway and I stopped the car. I said, ‘Julius, I saw ....’” Defendant objected and the trial judge permitted the witness to say that she had seen the woman that afternoon. Later in her testimony, Mrs. Cohen inquired of Judge McConnell if she could say what she told her seven-year-old son Robbie. The court allowed her to testify that she told Robbie that, “This was serious, to take my hand and go into the house like the man said.”
A leading question is one which suggests the answer desired and is often a question which may be answered by the words “Yes” or “No.” State v. Greene, 285 N.C. 482, 206 S.E. 2d 229 (1974). Whether counsel may ask leading questions is a matter addressed to the sound discretion of the trial judge and in absence of abuse of that discretion his ruling will not be disturbed on appeal. State v. Greene, supra; State v. Clanton, 278 N.C. 502, 180 S.E. 2d 5 (1971). Obviously, the questions here challenged were not leading questions. The witness simply related what she saw and said at the time the crime was in progress. This contention is feckless. Equally without merit is defendant’s argument under his assignment of error number 5 that the above questions resulted in prejudicial error to him because they were so overbroad and indefinite as to time that they failed to indicate the area of inquiry to which the questions were addressed.
[2] Defendant argues that the trial judge violated the provisions of G.S. 1-180 during the course of the trial. This assignment of error is based on exception number 59 which points to a question apparently directed to State’s witness Donna Russell by Judge McConnell. The witness had testified that her attention was attracted to defendant and his companions as they sat in the restaurant in which she was employed by “their talking dirty and talking loud.” The trial judge asked, “They were what?”
It is well settled that the trial judge must abstain from any language or conduct which tends to express an opinion as to defendant’s guilt or innocence or which tends to discredit or prejudice the accused with the jury. G.S. 1-180; State v. Belk, 268 N.C. 320, 150 S.E. 2d 481 (1966).
*402When the trial judge questions a witness to clarify his testimony or to promote an understanding of the case, such questioning does not amount to an expression of the trial judge’s opinion as to defendant’s guilt or innocence. State v. Everette, 284 N.C. 81, 199 S.E. 2d 462 (1973); State v. Colson, 274 N.C. 295, 163 S.E. 2d 376 (1968), cert. denied, 393 U.S. 1087 (1969). Apparently, the trial judge in the case sub judice did not hear the witness and was seeking to clarify the testimony of the witness for the enlightenment of both the court and the jury. Nothing in the question tended to indicate to the jury that the court had an opinion as to the guilt or innocence of defendant. This assignment of error is overruled.
[3] By his assignment of error number 11, defendant contends that the trial judge improperly limited his right of cross examination.
A defendant is entitled to a full and fair cross examination upon the subject of the witness’s direct examination, and this right is guaranteed by our State and federal constitutions. State v. Watson, 281 N.C. 221, 188 S.E. 2d 289, cert. denied, 409 U.S. 1043 (1972); State v. Bumper, 275 N.C. 670, 170 S.E. 2d 457 (1969). On the other hand, it is the duty of the trial judge to expedite the trial of cases and in performing this duty he may limit repetitious and irrelevant cross examination. Court proceedings should not be hurried in such a manner as to deprive a litigant of his rights, but the court should see that the public time is not uselessly consumed. State v. Carter, 233 N.C. 581, 65 S.E. 2d 9 (1951). The limits of legitimate cross examination are largely within the discretion of the trial judge, and his ruling thereon will not be held error in the absence of a showing that the verdict was improperly influenced thereby. State v. McPherson, 276 N.C. 482, 172 S.E. 2d 50 (1970).
The only exception specifically argued by defendant under this assignment of error is exception number 41 relating to the trial judge’s refusal to permit defense counsel to reserve the right to recall the witness Julius Cohen. We note that exception 41 was not assigned as a basis for assignment of error number 11 and therefore is not properly before us for consideration. Rule 10A, Rules of Appellate Procedure. In any event, whether a witness may be recalled is in the sound discretion of the trial judge. Moore v. Bezalla, 241 N.C. 190, 84 S.E. 2d 817 (1954). Our *403further examination of this record discloses that defendant was apparently moving very slowly in his cross examination of the witness Julius Cohen. The trial judge did on several occasions admonish the counsel for defendant to move on. However, it appears that the rulings challenged by the exceptions upon which this assignment of error is based were rulings which sustained objections to questions which were repetitious and argumentative in nature.
Defense counsel had fully and ably cross-examined the witness Cohen before these rulings were made and before defense counsel stated that he had no further questions of the witness but would reserve the right to recall him. Under these circumstances, we hold that the trial judge did not improperly limit defendant’s right of cross-examination.
[4] Defendant also assigns as error the court’s instruction on defendant’s failure to testify.
In this connection, Judge McConnell instructed the jury:
The defendant’s attorney asked me to charge you as to the right of the defendant to testify or not, as he chooses. He did not testify, and the law of North Carolina gives him this privilege. This same law also assures him that his decision not to testify creates no presumption against him. Therefore, his silence is not to influence your decision in any way in this case.
Defendant contends that by stating that defendant’s attorney requested the charge, the trial judge negated the effect of the instruction. We do not agree. While it is the better practice for the court not to instruct on defendant’s failure to testify, State v. Covington, 290 N.C. 313, 226 S.E. 2d 629 (1976), it is entirely proper to give the instruction upon defendant’s request. We are unable to discern prejudicial error because the jury was made aware that the instruction was given at the request of defense counsel.
Defendant’s final assignment of error is that the trial court erred by allowing the in-court identification of defendant by the State’s witness, Wendy Caudle. He contends that the circumstances under which the witness observed the armed robber on 27 May 1977 combine with the procedure used in a pretrial *404photographic lineup to give rise to a substantial likelihood of misidentification.
Following an extensive voir dire hearing conducted to determine the admissibility of Wendy Caudle’s in-court identification of defendant, Judge McConnell found, inter alia:
. . . that on or about the 27th day of May, 1977 . . . the garage or carport was lighted; that the den was lighted; that Wendy Caudle was seated some short distance from the door to the garage or carport, and that she saw the masked man go out into the garage and just at a point adjacent to the garage and lift his mask, ski mask, from his face, and that she saw him and later described him ... as being a man 6 feet tall, weighing approximately 180 pounds, with a long pointed nose . . . that on the 17th day of June, she was shown by Officer Farmer and Mr. Burpeau of the State Bureau of Investigation, 14 photographs of white males . . . that she pointed out 2 photographs of the defendant, Davis, and said that they looked like the man and that she could identify him if she could see him in person; that at a preliminary hearing held in connection with this case, she saw the defendant and pointed him out as being the person who was the masked gunman at the Cohen house . . . that Wendy Caudle is a 13-year-old young lady going into the 8th grade; she is intelligent, does not wear glasses, has keen eyesight and keen intelligence . . . and that she was some 20 feet from where she said she saw the defendant; that the defendant was in the residence of the Cohens for some 30 to 40 minutes, at which time the witness, Wendy Caudle, had an opportunity to observe his physique and other features even though he had on a ski mask. . . .
The court concluded that:
. . . there was ample opportunity for Wendy Caudle to observe the defendant, Davis, on the night of the 27th day of May, 1977, at the Cohen home. Further, that there is nothing to indicate any suggestion by any person which would color the identification of the defendant by the said Wendy Caudle; that there were no illegal identification procedures or lineups involving the defendant; that the first time she saw the defendant in person after May 27 was at the time of the preliminary hearing, at which time she pointed him out as *405the person she had seen at the Cohen home; that the in-court identification of the defendant is of independent origin, based solely on what the witness, Wendy Caudle, saw at the time of the robbery at the Cohen home on May 27 and does not result from any out of court confrontation or from any photograph or from any pretrial identification procedures suggestive or conducive to mistaken identity, and that there is nothing in the process of identification which would deny the defendant the due process of law.
Upon reviewing the evidence presented on voir dire, by both the State and defendant, we find that the court’s findings are supported by competent evidence and they are, therefore, binding upon us. State v. Harris, 279 N.C. 177, 181 S.E. 2d 420 (1971). Nevertheless, the court’s conclusions of law are reviewable by us. State v. Bishop, 272 N.C. 283, 158 S.E. 2d 511 (1968).
[5] We first turn to the possibility of any inherent suggestiveness in the pretrial photographic procedures. Here defendant contends that the procedure was impermissibly suggestive in that only six of the fourteen photographs used depicted men with grayish hair similar to defendant’s and in that only the two photographs of defendant did not show a police department name plate.
Even granting that the photographs used immediately narrowed the witness’s choice down to the six photographs of men with grayish hair, we do not perceive how such a limitation in any way indicated to Wendy Caudle that she should select defendant’s photograph from the remaining six. The absence of a police department name plate in defendant’s photograph is not so distinctive a feature as to suggest to Wendy that she should select it as depicting the armed robber. In fact, more distinctive features such as depicting defendant in different clothing, U.S. v. Butler, 405 F. 2d 395 (4th Cir. 1968), cert. denied, 396 U.S. 853 (1969), and using a color photograph of a defendant with other black and white photographs, U.S. v. Lincoln, 494 F. 2d 833 (9th Cir. 1974), have been held not impermissibly suggestive. Moreover, there appears to be a developing trend of authority which holds that in order to be deemed impermissibly suggestive, the feature which distinguishes a defendant’s photograph from the others used must somehow point to the defendant as the perpetrator of, or otherwise connect him with, the crime. See, Annot. 39 A.L.R. 3d 1000, Section 3(b) (1971). We find no evidence *406that the procedures used in instant case in any way suggested that defendant should be identified.
[6] Defendant challenged the competence of the witness Wendy Caudle because of her age.
There is no fixed age limit which renders a witness incompetent to testify. The test is whether the witness has sufficient intelligence to testify and to understand the obligations of an oath. Decision as to the witness’s competence rests within the sound discretion of the trial judge and that discretion is not reviewable except upon a clear showing of abuse. 1 Stansbury’s N.C. Evidence, Section 55, pages 160-161 (Brandis Rev. 1973). After observing and hearing this witness testify, the trial judge found her to be a 13-year-old young lady who possessed keen intelligence. He thereafter ruled her testimony to be competent. There is ample evidence to support this finding and ruling and no abuse of discretion is shown.
[7] Defendant further contends that the conditions under which the witness saw defendant’s face and the inability of other witnesses to identify the robber are circumstances which render Wendy Caudle’s identification of defendant inadmissible. He relies upon State v. Miller, 270 N.C. 726, 154 S.E. 2d 902 (1967), to support this contention.
In Miller, the Court considered the admissibility of testimony of a witness who was never closer than 283 feet to the accused and had never seen the accused before. The witness was unable to tell the officers the color of the man’s clothes, the color of his hair, or the color of his eyes. He described the defendant as being six feet, three inches tall and the accused was actually five feet, eleven inches. In rejecting this testimony as being inherently incredible and without probative value, this Court observed, “Where there is a reasonable probability of observation sufficient to permit subsequent identification, the credibility of the witness’s identification of the defendant is for the jury . . . .” 270 N.C. at 732, 154 S.E. 2d at 906.
[8] In instant case, there was evidence of sufficient opportunity to observe defendant for the witness to make a subsequent identification. Neither do we find merit in defendant’s contention that the witness Caudle’s subsequent absolute confirmation of her photographic identification was tainted because it occurred while *407defendant was seated with two or three lawyers at a table in the courtroom with an alleged accomplice sitting behind one of the lawyers. We have consistently held that no violation of due process results when there are “unrigged” courtroom confrontations which amount to a single exhibition of an accused. State v. Thomas, 292 N.C. 527, 234 S.E. 2d 615 (1977); State v. Henderson, 285 N.C. 1, 203 S.E. 2d 10 (1974). There is nothing in instant record which indicates a rigged confrontation or even a single exhibition of defendant which would violate due process.
We hold that there was no illegal pretrial identification procedure in this case. Had such illegal procedures existed as has been suggested, there is ample evidence to support the trial judge’s finding that the in-court identification was of independent origin and therefore competent and admissible.
No error.