B.Sc

There are 16 Geography (Hons) Colleges in Kolkata. Have a look at the details about the colleges from the link below:
https://www.shiksha.com/humanities-social-sciences/geography/colleges/colleges-Kolkata

Yes, will will easily get this course in this college.

Yes, all the three subjects are compulsory for these courses.

Yes, if you have completed your graduation in nursing, then you are eligible to take admission in M.Sc Microbiology courses. You just need a valid score and no pending backlogs to get admission. Best of luck.

It will be very difficult for you to get admission in St Xavier's College Kolkata with these scores. Although, you can give a try and participate in counselling. If seats are available in last round, then only you can get admission. Best of luck.

Your marks is good enough to get this college.
Good luck.

There is no BCA Programme admission in Ahmedabad University, but there is admission for BS (Honours) with Computer Science for which Physics and Mathematics are necessary subjects.

No, there is no such thing. One exam a day take place. Good luck.

Your rank is good enough to get college in this course. Good luck.

Yes, you can go for this course. You are eligible to get admission here. Good luck.