This question consists of legal proposition(s)/principle(s) (hereinafter referred to as 'principle') and facts. Such principles may or may not be true in the real and legal sense, yet you have to conclusively assume them to be true for the purposes of this Section. In other words, in answering these question. Further, you must not assume any facts other than those stated in the question. The objective of this section is to test your interest towards study of law, research aptitude and problem solving ability, even if the 'most reasonable conclusion' arrived at may be absurd or unacceptable for any other reason. It is not the objective of this section to test your knowledge of law.
Therefore, to answer a question, principle is to be applied to the given facts and to choose the most appropriate option.
PRINCIPLE : Nothing is an offence which is done in the exercise of the right of private defence.
FACTS : 'A' under the influence of madness, attempts to kill 'B'. 'B' to save his life kills 'A'.