Hi,

There is a particular norm by which you can challenge the Answer key released by NTA. The last date to challenge OMR sheet was up to October 7. Any discrepancy found in the OMR sheet has to be raised as an objection and you have to make a payment. If any of the answers in the OMR sheet released by the NTA is wrong, you will surely get marks for that, provided that you have raised the objection and have made the payment of INR 1000 per question.