CAT

You can apply for TAPMI, IMI-Delhi, SIMSREE-Mumbai, LBS-Delhi, IFMR, Great Lakes, IIT-KGP/Roorkee/Kanpur/Madras, K J Somaiya. The application forms of these colleges are still open, you can apply to them.

I don't think you'll get scholarship but you can call them and ask them about your case.
Scholarship criteria in Amity:
100% Scholarship Eligibility - Students securing 93% aggregate and above ((excluding Physical Education/ Fine Arts / Performing Arts / vocational / non written subjects) in CBSE/ ISC Board of Class XII and 80% in Graduation.
50% Scholarship Eligibility - Students securing 90% aggregate and above (excluding Physical Education/ Fine Arts / Performing Arts / vocational / non written subjects) in CBSE/ ISC Board of Class XII and 75% in Graduation.

You should prepare for SNAP and CMAT as they will provide you with more chances of getting into a decent college, but don't forget to appear for CAT as it has the widest spectrum of colleges.

You can apply for some good colleges with your score such as Welingkar Mumbai,IFMR, Christ University Bangalore, LBSIM, LIBA, UBS Chandigarh, BIMTECH Noida and BITS Pilani.

You can apply to ITM Mumbai, Balaji Institutes Pune, XIME Bangalore, Christ University Bangalore, Alliance University Bangalore, ICFAI Hyderabad, ASB Coimbatore, NIBM Pune, NIA Pune and SIES Mumbai.

Great Lakes, Chennai is a good option for you, you can also get calls from IFMR Chennai, SIES and Dalmia Mumbai, Alliance and Christ Bangalore, Kirloskar Pune as alternative B-schools.

You need to get at least around 80 percentile in CAT to get a good college. Prepare well. You can use Arun Sharma books available at major book stores and online shopping websites like amazon.