As a student in an exam hall. There's a particular question you don't know or can't recall the right answer to it. You asked your neighbour. And the answer he gave you doesn't seem correct. Although you don't know the right answer, you're certain what he told you is not correct either.
Will you go ahead and write what he told you, or will you leave that particular question unanswered?
Kindly share what you will do in such situation.