CBSE 12th

There are many options in the field of biology and medicines. Apart from MBBS, there are various degree courses, which you can opt.
You can check the below mentioned link:
https://www.shiksha.com/career-options-after-12th

There are various career options in the field of science. It varies from computer science to agricultural fields. Some career options different from orthodox league are data science, nanotechnology, artificial intelligence, etc.
You can check the below mentioned link:
https://www.shiksha.com/career-options-after-12th

There are many career options available after completing class 12th with commerce. You can go for graduation in B.Com and followed by MBA. You can look for career as financial planner, equity analyst, credit analyst and also you will have opportunities in the banking sector.
You can check the below mentioned link:
https://www.shiksha.com/career-options-after-12th

There is no criteria on class 12th marks. Student must be a graduate and should have passed class 10th and 12th. There is no minimum percentage required.

You can check the below mentioned links:
https://www.shiksha.com/career-options-after-12th
https://www.shiksha.com/careers-after-12th-list

Yes, you can expect a call from XIME-Bangalore. You have a decent academic profile. Generally, CMAT cut-off for XIME is around 80 percentile. Best of luck!

You need to complete your graduation before applying for MPSC.
The minimum educational qualification is as follows:
1. A candidate must hold a degree from any of the universities incorporated by the Act of the Central or State Legislature in India or other educational institutions established by an Act of Parliament.

Yes, you can pursue journalism and mass communication after completing class 12th in science. There is no compulsion of subjects.

Very bleak chances considering your CAT score.