B.Com

You haven't mentioned that for which particular university you want to know the eligibility criteria, as different university have different criteria.
However, in general the eligibility for M.sc (Statistics) is such that "Candidate must have passed B.A. (Honours)/B.sc (Honours) in Statistics or Mathematics or must have studied Mathematics and Statistics as subject in B.A./B.sc. Whereas for aggregate, reputed institutes like- IIT's, demands for 60% including all six semesters.
Wheras admission is also based on entrance in reputed institutes like- IIT's, ISI, etc.
Do, it would be better if you mention the name of any particular institute or university from where you want to pursue your M.sc. So that we can help you in more descriptive manner.

Firstly are you a B Pharm / M Pharm, as you need to be a qualified pharmacist to register your pharmacy and obtain a Pharmacy License. Or do you know someone who is B Pharm / M Pharm and is able to + willing to lend you his/her name against goodwill payment (not ethical but many follow this route in India) so that you can obtain a Pharmacy License.
Secondly you will need to decide on your investment. Your basic need will be a shop if you are targeting a local area (here you can buy one or rent one). Just make sure you do your maths for shop (buy/rent) + inventory.
Thirdly network with a Doctor / Hospital so that you can "informally tie-up" with them, this is the easiest way to access customer base (again not ethical but most follow this route), and
Finally you need some cash to stock up your shop, as credit will be tough for a new store.