Psychology

Yes, you can pursue M.Sc in Psychology after completing B.Sc in microbiology.

Yes, you can but you have to pursue B.Sc in clinical psychology and then M.Sc in clinical psychology and then PhD in clinical psychology.

Yes you can study M.Sc in Psychology. To puruse Masters you just need to have a undergraduation certification from a recognized board.

Yes, you can do it if you have taken arts stream i.e. BA in your graduation then only you can do PG in the mentioned subject.

Do it from IGNOU. For more please refer this link:
http://www.indiaeduinfo.com/cores/map.htm
All the best.

Indira Gandhi National Open University has M.Sc in psychology. You can actually try there it one of the best distance university in India.

Eligibility criteria for B.Sc in psychology:
Most of the institutes offering this course admit students based on their performance in the HSC (10+2) exam. The candidate needs to have:
10+2 level of education from a recognized educational board.
Secured a minimum aggregate score of 50% at the 10+2 level.
Have reasonably good problem-solving and mathematical skills.