Rule 8-302. Pleas allowed.

A. Pleas and defenses. The plea shall be one of the following: guilty, not guilty, or no contest. No other pleas shall be permitted. A plea of not guilty shall not operate as a waiver of any defense or objection. Defenses and objections not raised by the plea shall be asserted in the form of motions to dismiss or for appropriate relief. B. Failure or refusal of defendant to enter a plea. If the defendant fails to enter a plea, or stands mute, the court shall enter a plea of not guilty on behalf of such defendant. C. Rejection of pleas. The court shall reject a plea of guilty or no contest if justice would not be served by acceptance of such plea.