Point Out Incorrect Response

Point out incorrect response. The following are ingredients of section 79 of the Indian Penal Code:

A) Such a belief must be by reason of a mistake of fact and not by reason of a mistake of law.
B) Act must have been done by a person who is either justified by law or believes himself to be justified by law in doing it.
C) One must be legally bound to do that act and not only legally justified to do it.
D) Belief must be a bona fide belief in good faith.