B.Sc Botany

Yes, you can. But, I don't think you can do all the three courses together, because geography doesn't belong to the biological side. But you can do Botany, Zoology and Geology. It will have high value.

You should do B.Sc (Hons) in Botany. It has good future prospects.

As per your background, I would suggest you opt for M.Sc in Biotechnology, whereas, it completely depends upon your interest. I have one of my classmate who did Bachelors in Biotechnology with me and then moved on for Mass communication for Master's degree because of his interest.

Which subjects are you interested in?

Yes, it is necessary for M.Sc to get a degree in the same subject. So, if you want to do M.Sc in botany you have to do B.Sc in the same.

Yes, you are eligible.
Hope this helps you.

Kindly refer http://www.sjc.ac.in/guidelines_pg.html

You need to have a Bachelors degree in respective subjects like Botany, Genetics, Biochemistry, Microbiology, Genetics, Biotechnology, Life Sciences, Molecular Biology and Biomedical Sciences in Science stream. So, yes, you are eligible to apply.

Hi,
You can apply for M.Sc in Botany. You can also pursue your Post Graduation in Management area like MBA. If you are interested in teaching field then you can apply for B.Ed. Thanks.

Hi,
Graduation or another such equivalent course in a relevant discipline should be completed from a recognized university. Graduation needs to have been completed in any of:
Sc. (Forestry)
Sc. (Agriculture)
Sc. (Horticulture)
Tech. (Horticulture)
Tech. (Agricultural Biotechnology).
A minimum aggregate score of 50% (45% for SC/ST/OBC candidates) at the level of graduation. Thank you.