Section 178

If the accused pleads guilty the plea shall be recorded, and he may be convicted on it:

Provided that before a plea of guilty is recorded the Court shall ascertain that the accused understands the nature and consequences of his plea and intends to admit, without qualification, the offence alleged against him.

Criminal Procedure Code 131

If the accused refuses to plead or does not plead, or if he claims to be tried, the Court shall proceed to try the case.

Opening case for prosecution