Exam

No, you cannot apply for it after 12th.
Qualification Criteria:
For Army Wing of NDA Candidates should have qualified 10+2 or equivalent examination from any recognised board. For Air Force & Naval of NDA and 10+2 Cadet Entry Scheme at the Indian Naval Academy: Candidates must have passed 10+2 or equivalent exam with physics and mathematics subjects.

The institute accepts the scores of various national-level MBA entrance exams like CAT/ MAT/ XAT/ CMAT/ ATMA for admission to its MBA programme. Thapar School of Management has started the application cum admission process for its two-year full-time MBA programme for the academic year 2019-21. Visit here for more details: http://lmtsm.thapar.edu/admissions/apply-online.php.

You can get the previous year questions online and even in the university library. All the best.

HI Manisha,
You don't need to appear for any entrance exam. Although, different colleges and universities conduct their own admission tests for B.Com.

I would suggest Canada for non clinical programme and during that study, you can take up proper coaching and then write the exam. The reason is that no one in India is capable of giving coaching in India as it also covers the medical law of those respective countries.

Fees of most of the colleges is 2 lakhs/year excluding hostel. while counselling you will get a brochure of fees of different colleges which will remain same throughout graduation.

Cutoffs differ from college to college but your marks in class 12th pcm (average) should be above 60. Fees of most of the colleges is 2 lakhs/year excluding hostel.

You can check the same, online as well.

Check your eligibility first and then apply for the same.