Hey i m intersted in business so what should i prefer after 12th? should i do bms?

If business is what interests you, you can consider:
1) 12th (any stream)+BMS+MBA
2) 12th (any stream)+Graduation (any stream)+MBA

By pursuing BMS you get exposed to the subjects that one would study at MBA and could look at developing a business perspective right at graduation.

For information on colleges offering BMS you can log on to http://www.youngbuzz.com/colleges-guide

This should surely help.