Well i guess that you gave both exam of jee mains, paper 1 for btech and paper2 for barch. So as you are saying that you have got 45 marks in paper 1. And you have got 210 marks in paper 2. Well based on your marks, you won't get any seat in b.tech course in nit due to very poor marks, but as you are having decent marks in paper 2 , you will get a college in b.arch course in n nit.

Thank you.