Hello Mohit,

Considering you ST rank, you can definitely join national law university. Just apply for the colleges using your ST rank. I would also suggest you to keep your option open and apply for multiple colleges, as you know that the number of applicants in these exams are too high. 

Now, Some of the top Law colleges where you can apply using your marks are:-

NLU, Banglore

NLU Bhopal

NALSAR University of LAW

NLU, Jodhpur

Gujrat National Law college.

For more colleges, you can check the following link

https://law.careers360.com/college-predictor-result/50014?s=77071879331528210958

Hope you find this information useful. Have a great future ahead.