CBSE 12th results

No, you need to give all 5 subject combination exam. If you fail in any 2 subject, then only you could give the compartmental exam in same year session not in next year.

Hi Nikita,
The re-examination of any board paper does't occur unless there are some major issues with the actual paper. If the Physics paper would have leaked or canceled at some places across India, then there were chances for it to be re-conducted. Still, if you feel that you would not score enough in the actual exam, you can wait for the CBSE Class 12 Result 2018 If you score less, you can apply for CBSE Improvement Exam and boost your scores.

Depends on hard you work.

MBBS, pharmacy, biotechnology, D.Pharma, etc.

It totally depends upon your percentage. At least, you should score 33 marks. If you have applied for 3 subjects, then you should write for 3 subject. But, if you are planning to write from 2 subject it upon your teacher and principal.