Hello usha,

There are eligibility criteria to get admission for NIT as:-

•A candidate must have 12th passed or equivalent exam with minimum 75% marks.

•For sc/st , a candidate must have 12th passed or equivalent exam with minimum 65% score.

For further details, kindly check below mentioned link:-

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-eligibility-criteria/amp

I hope this helpful for you.

All the best! !