Hello Khalilur, 

Considering the OBC rank you scored in WBJEE, you can get into some of the top colleges under WBJEE. For that, I would recommend you to apply for colleges, use you OBC ranking instead of general ranking. 

Some of the colleges where you can apply are:-

Cooch Behar Government engineering college

Purulia government engineering college.

For more college prediction based on your general ranking, you can visit the following website. 

https://engineering.careers360.com/wbjee-college-predictor

Have a great future ahead.