Hello,
Admission in BBA course is done either based on 12th std or entrance exam(conducted by some of the reputed colleges). The entrance exams are IIM Indore IPM, IIM Rohtak IPM, JIPMAT, NMIMS NPAT, Symbiosis SET, DU JAT.
These exams are conducted by IIM itself. For this year the exams have been already conducted in June and July.
If you are willing to take admission in BBA you can get it based on your 12th std score. Here's a list of colleges that admits students based on 12th merit score.
1.BMCC, Pune
2.Jai hind college, Mumbai
3.Poornima university
4.MIT college of management, Pune
5.Amity University Mumbai
6.School of management Dr d.y patio University, Navi Mumbai
7.PUMBA Pune
Hope this will help, All the best.!!