Hey shlok

hope you are doing great as you have entered in 3rd year of bcom you should immediately start studying for your competition. as competition is very tough in MBA exams you hve to be very regular in studies and should give mocks regularly so that you can analyse your scores. Some of the entrance exams you should focus on are:

CAT

XAT

MAT

NMAT

SNAP

TISSNET

IIFT

GMAT. etc

Hope you found this answer useful.

All the best!