You can go for bcom honours or BBA . And their is a course in Delhi University called BMS and BBA(FIA) that you can also persue.

Hello,
That's really good if you want to become a businessman.For this you need to join a good reputed institute for BBA Course after class 12th board examination.You need to apply for best colleges like BIT MESRA,L.P.U ,.and many more for bba course.After BBA you need to give entrance exams like CAT,MAT,XAT for MBA course in top colleges like IIMs,XLSI,BIT MESRA.For admission related details you can visit the above mentioned college's website.
Good luck.

Completing 12, you do BBA then MBA. That's enough...