The Court has the power to summon witnesses of its own accord under Section 311 CrPC:

Correct option is C

Under Section 311 of the Code of Criminal Procedure (CrPC), 1973, the court has the power to summon or recall a witness at any stage of the trial if the testimony of that witness appears necessary for a just decision of the case. The provision empowers the court to ensure that no material evidence is overlooked in the interest of justice.

• Option (a) is incorrect because the court's power is not limited to the conclusion of prosecution evidence.
• Option (b) is incorrect as it does not require the trial to conclude before invoking this power.