*577The self-represented defendant, Laurentiu Lugojanu, appeals from the judgment of the trial court dismissing his motion to correct an illegal sentence under Practice Book § 43-22.1 The defendant claims that the trial court erred in not granting his motion because (1) his sentence exceeded the statutory limit for a class B felony, (2) there was a disparity *578between his sentence and the sentences received by the other participants in the underlying crime, and (3) the prosecutor vindictively increased the length of the *1194defendant's recommended sentence under the plea deal offered to him after the defendant invoked his right to a jury trial.2 The state argues that the trial court properly dismissed the defendant's second and third claims in support of his motion to correct because it lacked subject matter jurisdiction over those claims pursuant to § 43-22. As for the defendant's first claim in support of his motion to correct, by contrast, the state contends that that claim should have been denied on the merits rather than dismissed because, although the claim was unfounded in law or in fact, it fell within the court's limited subject matter jurisdiction under § 43-22. We agree with the state and, thus, reverse the court's judgment of dismissal with respect to the defendant's first claim only and remand this case with direction to render judgment denying that claim on the merits. The court's judgment of dismissal is affirmed in all other respects.
The following facts are relevant to this appeal. On or about May 7, 2009, the defendant and two other individuals were arrested and charged, inter alia, with home invasion in violation of General Statutes § 53a-100aa. Subsequently, the defendant and the others were offered plea deals involving recommended sentences of ten years incarceration in exchange for guilty pleas to conspiracy to commit home invasion in violation of General Statutes §§ 53a-48 and 53a-100aa. Although the other two individuals accepted such plea deals, the defendant rejected the state's offer and exercised his right to proceed to jury trial.
After unsuccessfully prosecuting a motion to suppress identification evidence, the defendant reinitiated plea negotiations with the state. The prosecutor *579responded by offering the defendant a revised plea deal involving a recommended sentence of twenty years incarceration, execution suspended after twelve years, followed by five years of probation in exchange for his plea of guilty to conspiracy to commit home invasion. On January 31, 2012, the defendant accepted this offer and pleaded guilty under the Alford doctrine.3
Notwithstanding this agreement, the defendant, at sentencing on April 5, 2012, asked the court to reinstate the original plea deal that he initially had been offered, but which he had rejected, for a recommended sentence of ten years incarceration in exchange for his guilty plea to conspiracy to commit home invasion. The court responded by noting that the defendant had rejected that offer and had "substantially [gone] through the trial." The court then imposed sentence as agreed to in the second plea deal, which the defendant had accepted. The defendant subsequently filed a motion to correct an illegal sentence under Practice Book § 43-22. The motion was dismissed for lack of subject matter jurisdiction. This appeal followed.
Because the trial court dismissed the defendant's claims for lack of subject matter jurisdiction, we first set forth general legal principles and our standard of review as to jurisdiction. "[T]he jurisdiction of the sentencing court terminates once a defendant's sentence has begun, and, therefore, that court may no longer take any action affecting a defendant's sentence unless it expressly has been authorized to act." (Internal quotation marks omitted.) State v. Tabone , 279 Conn. 527, 533, 902 A.2d 1058 (2006). Practice Book § 43-22 provides such authority, stating that "[t]he judicial authority may at any time correct an illegal sentence ... or it *1195may correct a sentence imposed in an illegal manner *580...." (Internal quotation marks omitted.) State v. Tabone , supra, 279 Conn. at 534, 902 A.2d 1058. "An illegal sentence is essentially one [that] either exceeds the relevant statutory maximum limits, violates a defendant's right against double jeopardy, is ambiguous, or is internally contradictory." (Internal quotation marks omitted.) Id. "[I]f the defendant cannot demonstrate that his motion to correct falls within the purview of § 43-22, the court lacks jurisdiction to entertain it.... [I]n order for the court to have jurisdiction over a motion to correct an illegal sentence after the sentence has been executed, the sentencing proceeding [itself] ... must be the subject of the attack." (Emphasis omitted; internal quotation marks omitted.) State v. Jason B., 176 Conn. App. 236, 243, 170 A.3d 139 (2017). "Our determination of whether a motion to correct falls within the scope of Practice Book § 43-22 is a question of law and, thus our review is plenary." State v. Osuch , 124 Conn. App. 572, 578-79, 5 A.3d 976, cert. denied, 299 Conn. 918, 10 A.3d 1052 (2010).
The defendant first claims that his sentence was illegal because it exceeded the statutory limit for a class B felony. Specifically, the defendant claims that a twenty year sentence of imprisonment followed by a five year term of probation effectively constitutes a twenty-five year sentence thus exceeds the twenty year limit for a class B felony authorized by General Statutes § 53a-35a (6). We disagree.
"Absent a statutory prohibition, a term of imprisonment with the execution of such sentence of imprisonment suspended after a period set by the court and a period of probation is an authorized sentence." State v. Dupree , 196 Conn. 655, 660-61, 495 A.2d 691, cert. denied, 474 U.S. 951, 106 S.Ct. 318, 88 L.Ed.2d 301 (1985). The plain language of the statute concerning authorized sentences, General Statutes § 53a-28 (b) (5), specifies that a defendant can be sentenced to a term *581of imprisonment, but have that sentence suspended while he serves a period of probation.4 In the present case, the defendant's maximum exposure to imprisonment under such a sentence is twenty, not twenty-five, years. Moreover, § 53a-35a expressly states that "the sentence of imprisonment shall be a definite sentence and ... the term shall be ... (1) [f]or a class B felony other than manslaughter in the first degree with a firearm ... a term not less than one year nor more than twenty years ...." (Emphasis added.) Further-more, the statute concerning periods of probation, General Statutes § 53a-29 (d), expressly states that "the period of probation ... (1) [f]or a class B felony, [shall be] not more than five years." (Emphasis added.) The defendant's sentence does not violate any of these provisions. We agree with the state, however, that the defendant's claim that his sentence exceeds the statutory maximum falls within the court's narrow jurisdiction to correct an illegal sentence under Practice Book § 43-22. See State v. Tabone , supra, 279 Conn. at 533-34, 902 A.2d 1058. An appellate court, however, "can sustain a right decision although it may have been placed on a wrong ground." (Internal quotation marks omitted.) State v. Osuch , supra, 124 Conn. at 583, 124 Conn.App. 572. The form of the trial court's judgment is improper as the *1196court should have denied on the merits, rather than dismissed, this part of the defendant's motion.
The defendant's remaining claims were properly dismissed for lack of jurisdiction. The defendant asserts that the disparity between his sentence and those of the other individuals involved in the underlying crime brings his claim within the purview of *582Practice Book § 43-22. As previously noted, jurisdiction under § 43-22 is narrow, applying only to limited claims. See State v. Tabone , supra, 279 Conn. at 534, 902 A.2d 1058. "Connecticut courts have considered four categories of claims pursuant to [Practice Book] § 43-22. The first category has addressed whether the sentence was within the permissible range for the crimes charged.... The second category has considered violations of the prohibition against double jeopardy.... The third category has involved claims pertaining to the computation of the length of the sentence and the question of consecutive or concurrent prison time.... The fourth category has involved questions as to which sentencing statute was applicable.... [I]f a defendant's claim falls within one of these four categories the trial court has jurisdiction to modify a sentence after it has commenced.... If the claim is not within one of the categories, then the court must dismiss the claim for a lack of jurisdiction and not consider its merits." (Internal quotation marks omitted.) State v. Robles , 169 Conn. App. 127, 133, 150 A.3d 687 (2016), cert. denied, 324 Conn. 906, 152 A.3d 544 (2017) ; see also State v. Mollo , 63 Conn. App. 487, 490, 776 A.2d 1176 ("a sentence imposed within statutory limits is generally not subject to review"), cert. denied, 257 Conn. 904, 777 A.2d 194 (2001). The defendant's claim regarding the disparity of sentences does not fall within the narrow scope of the trial court's jurisdiction, and thus the court properly dismissed that claim.
The defendant finally claims that the prosecutor acted vindictively in increasing his plea offer after the defendant exercised his right to a jury trial. The defendant notes that "as a direct result of [his] trial contemplation, the prosecution doubled [his] offer from [ten] years, to [twenty] years with [five] years [of] probation." The court's jurisdiction under Practice Book § 43-22 is not implicated because these events occurred during *583plea negotiations, not the sentencing stage of his criminal prosecution. See State v. Robles , supra, 169 Conn. App. at 133, 150 A.3d 687 ; see also State v. Francis, 322 Conn. 247, 264, 140 A.3d 927 (2016) ("[i]n light of the limited and straightforward nature of the claims that may be raised in a motion to correct, the potential merits of such a motion frequently will be apparent to the court ... from a simple review of the sentencing record"). Accordingly, the trial court properly dismissed this claim.
The form of the judgment is improper, the judgment dismissing the motion to correct an illegal sentence is reversed in part only as to the defendant's claim that his sentence exceeded the statutory maximum limit for a class B felony, and the case is remanded with direction to render judgment denying the motion as to that claim; the judgment is affirmed in all other respects.