The eligibility criteria for BCAcourses suggests that you must have completed higher secondary examination or equivalent diploma from recognised University with minimum 50%narks in total and havibg Mathematics as mandatory subject.

Since you havent opted for Maths, BCA is not the right choice.

You can go for B. Com degree and pursue CA or CS simultaneously which has very good demand.
You shoukd join Christ University for Bcom which takes admission on basis of class 12th scores in Bangalore.