In Which of the Following Would D Satisfy Either of the Two

Multiple Choice

In which of the following would D satisfy either of the two M'Naghten cognitive tests for insanity:

A) D is under the delusion that he is cutting his hedge but is in fact sawing off his neighbour's head.
B) D is under the delusion that he is killing a rival but is in fact strangling his girlfriend.
C) D, who is severely depressed, knows that he has killed someone but thinks it morally right because his victim was a paedophile.
D) D, who is severely depressed, kills his suicidal wife, knowing that it is wrong to kill.