Hi Srinivas,

The NTA gives students the opportunity to challenge the answer key and OMR sheet for NEET 2020.Under answer key challenge, you can raise an objection if you think the wrong answer is shown in the official answer key given released by the NTA, The window was opened on the 27th of September, 2020 and closed on the  29th of September, 2020.

In the OMR challenge, you can raise objections if the answer marked by you on your OMR sheet is not showing up on the sheet released by NTA. More details can be fond on this link:

https://medicine.careers360.com/articles/neet-omr-sheet