Principle Nothing is an offence which is done by a person who at the time of doing it by reason...........

Indian Penal Code (IPC) 1860 Others

Principle: Nothing is an offence which is done by a person who, at the time of doing it, by reason of unsound state of mind, is incapable of knowing the nature of the act, or something that he is doing is either wrong or contrary to law.

Fact: X takes his son Y who is three years old, for bathing to the well. He throws his son inside the well so that the son can have a good bath. After 10 minutes he also jumps into the well to take bath and get his son out of the well. Both were rescued by the villagers but his son was found dead.

X has committed culpable homicide amounting to murder

X has committed murder

X has done no offence as he can plead the defense of unsound state of mind

X’s family should be held responsible for allowing him to take the child to the well

Explanation:

Basically all options are incorrect. The correct answer should be "X has committed culpable homicide NOT amounting tomurder".
Besides, there is nothing in the facts to show that X has committed the act in unsound state of mind.
But, we have to choose one option from the given above, so we considered
In this case the baby was thrown not with the intention to kill him Further he jumped himself which clearly indicates there was no intention to kill.
Hence, option 3 is the correct answer.