Hi Ankush,

In order to get admission in top NITs you should score minimum 99 percentile. Whichever category you belongs to, you need to secure above said NTA score. Because it gives you the good rank which ensures the admission in top NITs and you will also qualify for JEE-Advance examination which will make you eligible for admission to IITs.

I hope your question has been answered properly.

All The Best!!