CBSE 12th

Choose the branch in which you are interested.
All of them will eventually lead to good future.
Keep one thing in mind, if you choose CSE, then students of other branches can get an IT job, but you won't be able to get the jobs in other fields.

You would be getting 8/10 in both 10th & 12th rating score for calculation of application rating. Hence, you cannot afford to loose a single score in application rating to even get a call from IIM A. Hence, try hard to get 10/10 in Bachelor's degree which would translate to 85%+ score in case you are an engineer or somewhat less in other streams. In terms of CAT percentile, by thumbs up rule, you would need more than 99.7- 99.8 percentile to get a call. Converting it would completely depend on your PI performance.
All the best!

That depends on what you want to do. If you want to pursue your future in commerce only, for eg. CA, B.Com BBA, etc. opt for Maths instead of physical education and Economics Instead of Entrepreneurship (if your school has that). But if you want to do something different like LLB, Hotel Management, then opt for anything you find easy. Accountancy, Business Studies and English are mandatory (at least was in my school).

Dear,
You can either try for BCA followed by MCA or BBA followed by MBA. If you aspire for legal profession appeared in CLAT to study Law.

There is no cutoff in schools. You just need to score passing marks/percentage i.e, i guess 33% marks.

Can I kindly know the subjects you've opted in commerce?

Hello Vignesh,
Many a times, there is slip between what we desire & get. Ideally speaking, it's better to be 12th pass than 10th pass. But if for some reason you have to take up job and can not pursue 12th, you can now do it as external candidate also.

Hello Deepti,
It's really heartening to know your desire to join Indian Navy. But presently you have to become a graduate for joining Indian Navy. I am attaching a link which will enable you to have all required information.
http://nausena-bharti.nic.in/women_entry.php