Banaras Hindu University

Go for BHU rather than NIT Agartala.

Not declared yet.

Yes, you can apply if you have 50%+ score in your graduation.

The Applicants must have completed Class 10th and 12th for a recognised Board/ University. The minimum qualifying marks are 50% for General Category and 40% for Reserved including OBC (NCL) in Physics Chemistry Biology (Zoology and Botany), and English . Candidates who are also appearing in the qualifying examination are also eligible. Generally the cut off for unreserved categories goes till 340-350.

No you can't get admission. Your rank is too much high.

You should visit the counseling portal of PG section for the latest cutoff.

You have to get your rank under 200.