Hello Sumant Kumar,

I would like to congragulate you on your score first.It's a good score.

Secondly, I would like to tell you that you have a low chance of getting into one of good NIT's for core branches.

You may have not  have a chance  to get any core branches like CSE at the top NIT if you belong to some category or you can even try for other good core branches at top NIT's as well.

I would suggest you to visit the careers360's link below which has a detailed explanation of the cutoff for NIT's.

The link for the same is:https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

Hope this helps and if you have any more doubts, feel free to comment down your query in the comments section below.

All the very best to you!