You have a moderate chance of securing a CSE seat at BIT Sindri with a CML rank of 1375 and an OBC-NCL rank of 259 through JCECEB counseling Rounds 2 or 3.

While BIT Sindri's CSE program is highly competitive, your OBC-NCL category rank of 259 improves your prospects as category cutoffs are generally lower. Previous year trends and Round 2 and 3 can provide opportunities as ranks may drop slightly.

To increase your chances, monitor the official JCECEB website for cutoffs, actively participate in counseling, and consider including related branches like IT as backup options.