NOTE: If there is mistake in question paper,then obviously students who attempted that question will get benefit of it.

I already challenged but how can I know that I am success in my challenge yaa not?? And also revised answer key have to be out before 5 june.how can we know..

Mistake not in question mistake in ans becoz they gave wrong Option that was came from directly NCERT

If you have challenged NEET answer key 2019 and the same has been accepted by CBSE,the following points will let you know that your challenge has been accepted-The revised NEET answer key released will have the rectified answer.Your expected score will be same as the score you obtain using the revised NEET answer key 2019.The amount you have paid for challenging the answer key will be refunded.p.s- I didn't mentioned the question but question PAPER.Hope this helpful to you.