Question

what is the answer of mention not

Answer 1

Mention not means no need to say thank you.

Answer 2

Answer:

In formal conversation Mention Not is  a reply to Thank You or Thanks.

Explanation:

That means that we don't want you to consider this as a burden and we did it for you just because of our friendship, relationship etc and it was an obvious thing. It depends on the situation. Mostly it doesn't carries a reply but if you want to initiate a conversation it can be started from his point as it is a good launching platform for conversations.