A. A would be liable because he was voluntarily drunk and voluntary drunkenness is never a defence.
B. A would not be liable and would be entitled to the defence of intoxication.
C. A would be liable because the rule is that we must attribute to the intoxicated person the same knowledge as if he was quite sober, but so far as the intent is concerned we must gather it from the attending circumstances of the case with due regard to the degree of the intoxication.
D. A would not be liable because his mental faculties were so much affected by intoxicating drink that he was unable to know the nature of the act.
✅ The correct answer is option C.