Hello Priyam, 

Your rank in SC category is very much sufficient to get you a good national Law college. Now as you mentioned that you want to join RMLNLU. Last year cutoff for this college was as follows.

SC     9175 

General    674

So this was closing rank for the year of 2017. For more information related to cutoff, you can visit the following website.

https://law.careers360.com/articles/rmlnlu-lucknow-cutoff

Now considering your rank, you have a high chance of getting admission into RMLNLU. Now other than this college some of the college NLUs where you can apply are:-

NLU Bangalore

NALSAR

NLU, WB

NLU, Bhopal

For more colleges based on your rank, you can visit the following link.

https://law.careers360.com/college-predictor-result/50014?s=13626923221528212623

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