Bachelors

Please refer to the link provided below for a list of colleges which offer post-graduate courses in M.Sc. Considering your field of study in Bio-chemistry you should be able to navigate to a course and college of your choice.
Link: https://www.shiksha.com/science/colleges/m-sc-colleges-india

Hi Natasha, scholarships are awarded by the universities themselves, you will find it on their website.You will be considered for scholarship at the time of application.They are gven to meritorius students. Besides the universities you can also check organizations like Aga Khan Foundation, Fullbriht Scholarship, Inlaks Shivadasani Scholarship etc.

Mainly, finance deals with the economics. You should go with B.Com.

Your final marks would have to be high enough to meet the university's admission cut-off plus you may be expected to explain the reason for such high backs by both university and high commission.

IISc-Bangalore, but it requires very good marks in JEE Advanced.

Don't do it through correspondence, do it in distance mode. It will be a value addition. It is definitely beneficial.