B.Sc

Hi, which course you should pursue is something you must decide and know. If you need better guidance please elaborate your subjects as non-medical is a very generic term and does not imply anything. Also, mention your interests.

Your profile is good. You can expect a call from SDMIMD. In case you have a better score in XAT or CMAT do fill them up in the application form.

You can prefer Arihant publication book.
All the best.

You are eligible to appear for GRE even now as the only eligibility requirement for GRE is the document required to prove your identity.

Dear,
As per your query you can think of these option for future career
Wild Life Science
Psychology
Microbiology
Nano Science
Agriculture
Life Science
Zoology
Physics/Chemistry Hons
Environmental Science
Neuroscience
Even, you can think of these field too:
B.Pharma
Physiotherapy
Biotechnology
Nanotechnology
Food technology
All the best

Both are different streams, so comparing them makes no sense. Figure out what you enjoy studying most, figure out your skills - Do you like decision making? Do you have good analytical skills or do you like research oriented work? Take a psychometric test and check your aptitude. If you want an MBA later again, there is no point doing B.Sc. Choose the field you really like.

It depends upon the university. As per my knowledge, the fees start from Rs.20,000 to Rs.45,000.

If you have math in your graduation degree, you can apply for MCA.