hello deepanshu......

to get an admission in nit you have to score more than 75% in the 12th board exams conducted by the perspective board exam and also in jee mains paper you have to score more than 200 even though you have reservations because if you score above 200 it is easy for you to get seat in a top ranked nit college so you may be of any category if you score above 200 you can get an admission in nit

i hope this information is helpful

all the best.