Hello Rudra, please check out the following link for detailed info on WBJEE cutoff: https://engineering.careers360.com/articles/wbjee-cutoff

Also feel free to use this wbjee college predictor to be assured of which college you might have a chance of getting into: https://www.careers360.com/wbjee-college-predictor

If you are not alloted any college in 2nd round or further subsequent rounds, you can definitely take admission in the college you got in first round, given that you have donw your document verification and college option freezing before the mentioned deadline.

Good Luck.