Can I pursue CA and MBBS courses simultaneously?

CA and MBBS? No, it is impossible. You will fail in both the courses. Students can't even manage their schooling and coaching together and pursuing 2 degrees at a time is not good.

These two are totally different courses in their approach. You will be in stuck in a great problem. CA require minimum 9-10 hour study per day and MBBS requires minimum 12 hour study per day. May be, its seems easy to do two courses simultaneously, but it is not. At the end, it depend upon you, how

It is not possible because MBA would need 8-10 hours of studies daily and CA would need 10-12 hours daily. You can't manage both simultaneously.

No, you can not. You'll be having heavy study load next year onwards. So, you won't be able to pursue two courses simultaneously. So, focus on the studies. All the best.