Dear applicant, M.Sc Microbiology is a great course helping you to achieve your career goals. If you think of the best college in Kolkata, you can opt for St. Xavier's College. You need to secure good marks in your B.Sc degree and St. Xavier's have their own entrance examination. If you will be able to crack it then you will be eligible for admission.

https://www.careers360.com/colleges/st-xaviers-college-kolkata/msc-microbiology-course

This college has extremely good faculties to guide you in future and well equipped labs too. Hope you will be able to make your chance,

Good luck!!