I am interested in business subject. Which course is better among BBS and BBM? I am doing 12th from CBSE board.

The main aim of this course is to make the student competent to take major managerial decisions, handle teams and manage the administration of a company on a managerial level. It helps to develop skills required to deal with personnel and clients. Some of the specializations in BBM are Finance, Oper

Both are good. What more important is that the college from which you do you BBS or BBM. Both are good courses but what really makes a difference is the college you choose. So, research well (ask me if you want to) and then choose what you want.