Dear Subha

There has not been any notice issued regarding the revised neet answer key yet.

The result has been alresdy declared and you may check it on https://ntaneet.nic.in/NTANEET/result/ResultNEET.htm

However,many coaching institutes has not raised objection on any chemistry answers but only for 1 question of phy and 3 question of biology.

Beside, you will come to know eventually about it, once the notice regarding the same get published.

Good Luck.