It depends on your interest & capability all are the good options. If you want to make your career in teaching or lecturer then you can go for M.Sc Chemistry. And after compleing B.Pharma you can go for Gov & private sector both. In Government Sector you can apply for the posts of Drug Inspector, pharmacists at government hospitals. In Private Sector you can get jobs at Pharma companies also private hospitals hire B.Pharm graduates as in-charges of their pharmacies.

MBA helps you to boost your confidence & get a growth in the corporate sector. To get admission in top colleges you need to appear for the entrance exam like CAT, CMAT, MAT, XAT etc. To get the complete detail about the exam you can go through with given below link.

Top MBA Entrance Exam

Good Luck!