CA

Yes, you can pursue BBA in IB along with CA.

For CA it is better if you have maths, as to pursue CA you have to appear for an entrance called CPT which includes the syllabus of 11th and 12th along with maths subject.

You can get some good colleges in south campus. Try for it. Best of luck.

To clear CPT, you required 30% marks in subject and total marks 100 out of 200. For clearing IPC and CA final, you will be needing 40 marks in each subject and 50% marks overall.

It is not compulsory after completing your graduation. With atleast 60% marks, you can register your self for IPC but before registration, you should complete a training.

After 12th for doing CA, you should register your self for CPT and after clearing that, you should register yourself for IPC and after clearing that, there are some training like ITT-OT complete that and then registered yourself for CA final.
You should choose commerce for doing CA.

Hi,
MBA will give you skills required for operation in corporate along with knowledge. Completing CA will be a tough call.
All the best.