In the criminal law, self-defense has always been recognized as a ground of justification. Article 25 of the TPC defines self-defense as follows:

"No penalty shall be imposed upon an offender in respect of acts which were necessary to repel an unjust assault which is directed, carried out, certain to be carried out or to be repeated against a right to which he, or another, was entitled, provided such acts were proportionate to the assault, taking into account the situation and circumstances prevailing at the time."

The correct answer is D.