
250 S.E.2d 87 (1979)
39 N.C. App. 328
STATE of North Carolina
v.
Ray BAGLEY.
No. 7827SC708.
Court of Appeals of North Carolina.
January 2, 1979.
*88 Atty. Gen. Rufus L. Edmisten by Sp. Deputy Atty. Gen. John R. B. Matthis and Asst. Atty. Gen. Acie L. Ward, Raleigh, for the State.
Rowell Connor Cloninger, Jr., Gastonia, for defendant-appellant.
ARNOLD, Judge.

I.
Defendant first contends that the trial court erred in admitting Stowe's testimony that she had bought heroin from him 75 to 100 times in the past. Evidence of prior crimes is inadmissible to show a defendant's disposition to commit a crime. State v. Little, 27 N.C.App. 211, 218 S.E.2d 486 (1975); 4 Strong's N.C. Index 3d, Criminal Law § 34.1. The general rule is that evidence of another offense is inadmissible even though the other offense is of the same nature as the crime charged. State v. McClain, 240 N.C. 171, 81 S.E.2d 364 (1954). "Since evidence of other crimes is likely to have a prejudicial effect on the fundamental right of the accused to a fair trial, the general rule of exclusion should be strictly enforced in all cases where it is applicable." Id. at 176, 81 S.E.2d at 368. The well-established exceptions to the rule stem from the test of logical relevancy. If the challenged evidence "reasonably tends to prove a material fact in issue, it is not to be rejected merely because it incidentally proves the defendant guilty of another crime." Id. at 177, 81 S.E.2d at 368. Among the exceptions set out in McClain is the "intent" exception, which we find applies here: "Where a specific mental intent or state is an essential element of the crime charged, evidence may be offered of such acts or declarations of the accused as tend to establish the requisite mental intent or state, even though the evidence discloses the commission of another offense by the accused." Id. at 175, 81 S.E.2d at 366.
Although defendant was indicted and tried for both selling heroin and possession with intent to sell under G.S. 90-95(a)(1), *89 he relies on State v. Choate, 228 N.C. 491, 46 S.E.2d 476 (1948), to support his argument that intent was not in issue here. Choate was a prosecution for abortion, and the challenged evidence was the testimony of other women that the defendant had performed abortions on them. Defendant denied having performed any abortions at all. The court indicated that where the defendant did not admit that he committed the act and try to justify it, but instead denied committing it, it was improper to admit the challenged evidence to show intent, as intent was not in issue. Choate differs from the case before us, however, in that abortion is a general intent crime, in which intent is not an essential element. A charge of possession of heroin with intent to sell obviously requires that intent be proved. Defendant's argument is that, since the charge of possession here arose from the selling incident, testimony of the sale carried with it the presumption of intent to sell, making it necessary for the State to prove only that defendant possessed the heroin when he sold it. Even accepting this analysis as true, the evidence of prior sales as showing intent was properly admitted. As the court pointed out in State v. Simons, 178 N.C. 679, 100 S.E. 239 (1919), even if the jury found in accordance with the presumption of intent, the challenged evidence was, at the most, unnecessary but not incompetent. The McClain intent exception does not require that to be admissible the evidence be the only available proof of intent, but merely that it "tend to establish" the requisite intent. We note that the challenged evidence was admissible only with regard to the charge of possession with intent to sell and not to the charge of selling; however, the limiting instruction given in the charge to the jury was more than adequate. This assignment of error is without merit.

II.
Defendant also assigns error to the admission of two portions of the testimony of Officer Bryant. After the heroin buy, Bryant received a tinfoil packet from the officer who had accompanied Stowe to make the buy. Bryant testified that he wrote his initials, the time and date on the packet when he received it, then returned to the office, put the packet into an envelope and wrote on the envelope. During direct examination the following then occurred:
Q. And what is that writing, please?
A. In my own handwriting, it says, "Purchased from Ray Bagley at 4:20 p. m., 5/17/77, at an apartment on North Weldon Street, Gastonia, by Patricia Wylie Stowe, handed to Sherrie Harmon by Patricia Stowe on Weldon Street at 4:25 p. m., 5/17/77, given to Detective Bryant by Sherrie Harmon at 4:35 p. m., 5/17/77, in Room 136 at the Ramada Inn, Gastonia."
MR. PUETT: Now, Your Honor, we would MOVE TO STRIKE that portion.
COURT: You did not object. MOTION TO STRIKE IS DENIED.
MR. PUETT: The question was competent, Your Honor. I'm just moving to strike that portion that is incompetent.
COURT: He said that's what he wrote there.
MR. PUETT: Yeah, but thatpart of that is competent.
COURT: Well, you did not object to the question. MOTION IS OVERRULED.
Defendant argues that his motion to strike was improperly denied because portions of the answer were hearsay.
We note first that it was incorrect for the judge to deny defendant's motion to strike merely because defendant did not object to the question. As defense counsel points out in the record, the question itself was not objectionable, and "when inadmissibility is not indicated by the question and becomes apparent in the answer . . ., the objection should be in the form of a motion to strike the answer or its objectionable part." 4 Strong's N.C. Index 3d, Criminal Law § 162.3 at 829.
We are not persuaded by the State's argument that the writing on the *90 envelope was admissible evidence under the "official records" exception to the hearsay rule. See generally 1 Stansbury's N.C. Evidence § 153 (Brandis rev. 1973). Portions of the writing clearly were not "within the personal knowledge of [Officer Bryant]," id. at 513, and constituted inadmissible hearsay. We find, however, that defendant failed to indicate which portions of the answer he wished to have stricken, as he is required to do. There is no error in the overruling of a general objection where the evidence is competent for any purpose. 4 Strong's N.C. Index 3d, supra.
Nor do we see merit in defendant's argument that it was improper to admit Bryant's testimony that fingerprints could not be obtained from the tinfoil, since Bryant had not been qualified as an expert. Our statement in the case of State v. Mitchell, 6 N.C.App. 755, 757, 171 S.E.2d 74, 76 (1969), applies equally here: "[Defendant] could not be prejudiced by the lack of evidence against [him] implicit in the State's admission that no fingerprints had been taken . . . ."

III.
Before the State presented rebuttal evidence defendant moved for a mistrial, partially upon the ground that on the preceding day, according to defense counsel, the trial judge had commented to him "that I could come out here and tell my client to plead guilty and take ten years and that I might could save him some time." The court responded:
COURT: All right, Mr. Puett, that MOTION IS DENIED; and you can take it up. You have a habit of coming to judges and talking about your cases; and I don't like it; and I told you I would not go along with a plea bargain of three to five years; that if he wanted to plead guilty, I would agree that it be ten years; and don't you ever come into my chambers again. Do you understand?
After the verdict was returned, the defendant was sentenced to a total of 15 years.
In the case at bar the record is sufficiently different from State v. Boone, 33 N.C. App. 378, 235 S.E.2d 74 (1977), relied upon by defendant to support his contention that the trial court imposed a greater sentence because he did not enter into a plea bargain, to distinguish the two cases. We see no basis for defendant's contention.
Unlike Boone, supra, the record here is devoid of any reasonable inference that defendant was penalized for pleading not guilty. Suffice to say, the record does reveal, from the statement by counsel for defendant, that the purported statements made by the trial court were "made prior to the time that all of the evidence was heard." Furthermore, the record is supportive of the trial court's finding that "from the evidence in this case . . . [defendant] is not a casual pusher of heroin, that he is a substantial dealer with connections to obtain a very high quality heroin and rather substantial quantities on short notice."
Having reviewed all defendant's other assignments of error we find that defendant received a fair trial, without prejudicial error.
No error.
HEDRICK and VAUGHN, JJ., concur.
