Canan we participate in mop up round in WBJEE 2018 if I already taken admission in allotted institute by wbjee still want to participate ..

You need to withdraw admissiin in alloted college firstly and only then you can be eligible for mopup counselling based on vacant seats as there is high probability that studnets get desired streams and college based on vacancies of all category level seats.

Counselling protocol shared bekow.

https://engineering.careers360.com/articles/wbjee-counselling