ICSE

Hi Aman,
Candidates who have passed 10th Std. / SSC examination and obtained at least 35% marks in the qualifying examination are eligible to apply for the course.
http://ghru.edu.in/polytechnic/mining/

Please note that NCHMCT rank is valid for one year only, because of you have the rank of year-2017, so you can not get admission in any IHM on the basis of this rank. However few private institutes of NCHMCT are offering the admission, for those who missed NCHMCT JEE-2018. For more details please visit NCHMCT website or contact directly.

You can choose any subject of your choice. Studying with arts can also help you a lot for PC's.

Hello Vikas, Its wonderful that you have interest in computer and drawing. You would have bright future. Today designing on its boom you should go in this field. Computer Aided Design (CAD) is I think perfect for you initially. Further you can explore yourself by doing more. Keep it up. Best of luck.

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.