ICSE

You will in case have to do class 12. Either you choose ISC or let the coaching centre decide / suggest it for you. Because for almost all officer jobs 12th is the minimum requirement. You may opt to prepare for competition along with class 11&12 and in that case coaching centre is a good option. But choose the 12th board wisely so that you score good in 12th and become eligible for competing.

Yes, you can get admission but you have to give the entrance exam of the college.

Yes, 96.25% is a very good score. You can easily get admission in the college. But for B.Com, St. Xavier's has evening classes

To apply for B.Ed, you need to have passed graduation with minimum 50% marks. I would be difficult to get admission with 46% marks however I would request you to contact the college officials to have a better clarity.

Dear, I think it is very difficult to tell, whether you will get call or not, as the standards are getting higher every year. Also, with the score you have till now is very good, and this shows you are good at studies, so why are asking for minimum, you should try to bring the maximum.

ICSC board is better. Yes, you can migrate from CBSE to ICSE after 10th.

Yes, there is a good chance.

90-100 marks- A grade
80-90 marks- B grade
70-80 marks- c1 grade
60-70 marks- C2 grade
50-60 marks- D grade
40-50marks- E grade
Below that fail.

Go for EEE i.e. Electrical and Electronics Engineering, as it has high scope, and it will give you what you want. But do it in good colleges, like in NIT or IIIT or IIT.

There is no different cut-off for UP board. DU examination students seeking admissions to undergraduate courses at various faculties/departments on basis of merit score or entrance exam need to be qualified in Senior Secondary School Certificate Examination (SSSCE) i.e. class 12th qualifying examination from CBSE board or equivalent board of education.