Hello,

To challenge the official answer key you will have to go to the official website. Login with your Application Number and Password and then click on the Key Challenge tab and select the Test Booklet Code that they wish to challenge NEET 2021 answer key. Select the question that you wish to challenge then in the screen that appears candidates have to select the answer that according to them is correct, they may give additional justifications for the same. After that click the submit button and pay the challenge fee. They can do so via debit card or credit card