Hello aspirant,

As you have asked i want to inform you that atleast you have to attempt 40 out which 33 to 35 must be correct to score good marks in physics and around 37 to 40 must be correct in chemistry and around 30 to 32 should be correct out of 40 that you will attempt in WBJEE for getting a good college as competition is increasing every year.

Hopefully i have answered your doubt.