CBSE 10th

If you want to do BBA after 12th, then take up commerce stream in class 11-12. You can keep maths or skip maths. If you keep maths, then you will be able to do BBA from St. Xaviers.

If you are in class 10 now, how can you appear for 12th next year?

You can't skip mathematics in class 10th.

Hey, masters study means post graduation. Before that, there is 11-12th and under graduation. What do want to study after 12th? If engineering/medical, then take up science in 11-12, otherwise commerce or arts.

Look recently i gaved my 12 grades exam. According to my exprience.
1.if you can study regularly and daily, then you can think for PCM+(BIOFOCAL). Dont go with biology(my preference but totally depend on you.
2. If you can't study regularly and daily basis(min 2-3 hours) look dealing with science subject requires alot of practise rather than reading, so u need to take care of it. Back to point, if u cant study regularly and you want to do B. Tech, then go with diploma(3years)+ b. Tech degree(3 years).

If you are weak in maths, then science will not do. Take up commerce stream, without maths. What was your % in 10th? Strong and weak subjects? Tell me, so that I can guide you better.

Dear Prakash,
I would suggest you to visit the career portal of Indian Navy http://www.nausena-bharti.nic.in/career.php
Hope it will be helpful for you to find career matching your qualification.
Regards,
Arun Dev

Take up science stream in 11-12th with Biology. You can keep hindi. Study hard in all the subjects, but a little more in Biology. After 12, sit for medical exams to get into top colleges. Know this, registration for medical exams begins before you even complete 12th finals. All the best !!