My rank in WBJEEB is 91k. Which college can I get?

Sorry to say but with this rank the chances of getting any good college are bit rough and if you belong to general category then almost impossible and even if you manage to get some average ranked college you might not be able to get the core branches as their cutoffs are very high. Though the cutoffs of different colleges aren't out yet till then you can predict what colleges you might be getting with this rank with the help of wbjee college predictor and can also check previous years cutoffs by going through these links.
https://engineering.careers360.com/articles/wbjee-cutoff
https://engineering.careers360.com/wbjee-college-predictor
Good luck!!

sorry!!

the information you provided is insufficient.check it in the belove link giving the details needed.

https://www.shiksha.com/b-tech/resources/wbjee-college-predictor