My subject combination is chemistry, biology, nutrition, psychology,hindi and english in 11 and 12. If I do my bsc in nutrition with chemistry and physillogy/zoology as pass subject ,can I sit for neet while I am pursuing the bsc degree or after i have completed bsc?

To be eligible for NEET, you should have Physics, Chemistry, Biology and English as your core subjects in your 12th. Now even if you pursue B.Sc, your 12th eligibility is considered for NEET. And if you do not have Physics as one of your core subjects in NEET, you unfoertunately are not eligible for NEET. You cannot have Physics as an additonal subject. It needs to be a core subject.