a mental disease

Question 30 Under the McNaghten rule in an insanity defense, the defendant is legally insane at the time of the crime, if, because of a mental disease or defect he does not know that what he is doing is wrong, or does not know: Select one: a. that the behavior is against the law. b. the identity of the victim c. the nature and quality of the act. d. that he has a mental disease or defect.