Pankaj,

             If you check last year's opening and closing ranks of colleges, you may get to know that admission process goes on the basis of GMR, not category rank. You can get a complete list of opening and closing ranks of last year using https://wbjeeb.nic.in/wbjeebcouns/orcr/PrevYearORCR.aspx

You can always use https://www.careers360.com/wbjee-college-predictor tool to get a complete list of colleges you may eligible for.

Regards