Dear Student,
Glad to hear that you aim to pursue your B.arch from an elite college like NIT but being eligible is no guarantee that you might be selected there as it will require quite a good efforts and marks obviously. The minimum educational qualification required is a 10+2/ Intermediate with a minimum aggregate of 50% marks. Candidates wishing to apply forB.Arch admission in NIT are required to appear for JEE (Advanced) exam.
Hope this might help you.