Microbiology

I would suggest you to go for M.Sc in medical microbiology.

After M.Sc in microbiology, you can go for M.Phil and Ph.D. in microbiology or medical microbiology, food microbiology and many more.

You cannot get direct admission in second year of B.Sc in microbiology. Complete your Diploma and try to make your career in pharmacy.

Eligibility criteria to get admission in Master of science in any college is atleast 50 % in your graduation. Secondly, you need have microbiology as a subject in final year.

Sorry but I would suggest you to go for regular course as Masters in Microbiology requires a lot of practical work.

Yes sure you can pursue microbiology

Yes, you can get a college for microbiology from NRI Quota.

Microbiology is the field which has different specializations including applied microbiology. Some of the branches in M.Sc which you may encounter in this field are mentioned below:
Master of Science in Applied Microbiology
Master of Science in Medical Microbiology
Master of Science in Microbial Genetics and Bioinformatics
Specializations in Microbiology:
Agricultural Microbiology
Industrial Microbiology
Evolutionary Microbiology
Nano Microbiology
Cellular Microbiology
Soil Microbiology
Veterinary Microbiology
Generation Microbiology
Microbial
Water Microbiology
Pharmaceutical Microbiology
Microbial Genetics
Environmental Microbiology

Hey Shuvam!
For admission in St. Xavier's College, Kolkata with B.sc Honours in microbiology, you must have Mathematics as a compulsory subject.
Kindly go through the link of eligibility criteria
http://www.sxccal.edu/admissions/SXCAdmission2018/UG8102/EligibilityCriteria.htm
I hope this helps.
AIMS PUNE admission procedure:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=http://www.aimsinstitute.in/admission_details.html&ved=2ahUKEwjzkI3z44rbAhXZXSsKHV0zBR8QFjABegQIBxAB&usg=AOvVaw1eZhdLNBZb9OtnWVd8CcgI
AFMC admission procedure :
http://www.afmc.nic.in/#nogo22
Good luck Shuvam!

Hi Madhurima, your question is a bit unclear to me, but I hope this link will help you with your doubt.
http://www.sxccal.edu/admissions/SXCAdmission2018/UG8102/infoBABSC.htm
If you still have any doubt do revert back.
Wish you good luck!