M.Sc

Hello Anjani,
Of course you can. There are different universities abroad offering really varied types of courses. But unfortunately such information has to be obtained individually. I would advise you to approach an agency specialising in this area. There are very many nuances in whole process and you must get them all right.
Best wishes

I don't think IITs offer biotechnology but you can check Shiksha's website and use filters to see it if gives such course.

B.Sc is Bachelors in Science and M.Sc is Masters in Science.

Here is a list of open universities from where you can pursue M.Sc in statistics:
1) IGNOU
2) DR. B.R. Ambedkar Open University
I have mentioned a link where you can check for different open universities in Delhi NCR offering M.Sc courses:
https://www.shiksha.com/science/colleges/distance-correspondence-m-sc-colleges-delhi-ncr

If you like teaching then you could do your B.Ed and be a lecturer in any recognised institution.

You should go for M.Sc in computer science as computers and IT services is demanding more employees to work in their companies. You will get good payment too.