All top colleges accept OBC ranking. There is a separate list for general,OBC,ST,SC etc. in the colleges.

Some of the top colleges in West Bengal are Jadavpur University,Maulana Abul Kalam Azad University of Technology,Kalyani Government Engineering College,Jalpaiguri Government Engineering College etc.

You can see opening and closing ranks along with separate merit list for different categories at some of the top colleges under WBJEE  : https://collegedunia.com/exams/wbjee/cutoff 

Thank you.