Hello student cut off vary every year on various factors like level of question in examination seats available and total nunumber of applicants in the entrance examination. As per previous year records it's expected that the cut off for SC category students will be around - 16800.

Previous year records it was 16834.

For more details refer to the link mentioned below - https://www.google.com/url?sa=t&source=web&rct=j&url=https://law.careers360.com/articles/cnlu-patna-cutoff/amp&ved=2ahUKEwiMuYq-mJHsAhXaF3IKHcv6B74QFjAEegQIBhAF&usg=AOvVaw2-Nq6YTqdkZYxgybRywdUZ&ampcf=1

Feel free to comment if you've any doubt

Good luck