Science

Dear Audrin!
It's all depends upon where your interest lies within. After Commerce (+Maths) you will have the wide range of options available like, Finance or Economics Hons etc. CA CS CFA etc. So choose the best fit for you. Hope this helps.
Good Luck.

Yes, there is. CUSAT is the exam used by Chandigarh University to measure the capabilities of students joining their University. Though, it is not mandatory to give that exam if you have scored more than 60 percentage in your 10+2.

Yes, IIMC have under graduation courses too. You can take admission in the course you want. You can apply for any course here. They provide many under graduation courses. You can check their website.

I am sharing a link in which you will get answers of your query. http://www.imedpub.com/scholarly/medical-biotechnology-journals-articles-ppts-list.php
Please go through this link to clear your doubts.
Good luck.

Biotechnology is one of the best career in coming future prospects so it's better aim.

You can get jobs in pharmacy and research on medicines preparation.