Hey daran! Thanks for contacting careers 360.

For candidates to qualify for the admissions to nit's /iit's/ gfti etc they should have secured at least 75% marks in class 12 or be in the top 20 percentile in class 12 exam conducted by the respective boards.

You can refer to more information in this link provided by this website.

https://engineering.careers360.com/articles/new-eligibility-criteria-for-nits-and-iiits-admission-says-mhrd

Wish you all the best!