Hello Subhadip Mondal. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

Note that WBJEE is one of the most important engineering entrance exams after the JEE and BITSAT. So, obviously, the level of input you should put into your WBJEE preparation to get into a very good college should be quite high.

I would like to first tell you that please study your NCERT / CBSE topics of class 11 and 12 thoroughly. This will be very useful for you in your main exam.

Aprt from this, the most important thing is to practice from the past year question papers of WBJEE by Arihant Publications. The tips and the hints provided will be very useful to crack the questions very quickly in the D-day.

Also, I would like to direct your attention to this Quora question:

• https://www.quora.com/What-are-the-best-books-to-prepare-for-WBJEE-in-one-month

Hope this helps you and all the best!