Colleges in West Bengal

This may not be possible as your percentage is not that good so, it cannot be guaranteed but, yes you can apply. You may get admission.
Good luck.

You need to have 65% in CAT or MAT for admission.

Your academics scores are decent.
All the IIM A and B have a different CAT cut-off.
Like IIM-A's minimum 80%ile and the sectional cut-off is also given weightage along with class 10th, 12th and graduation marks, and work exp. Similarly, in IIM-Bangalore and Calcutta, the minimum is 90%ile and other factors matter too.

Hi Ankita,
For applying in microbiology honors at St. Xavier's College, Kolkata you must have minimum of 60% in aggregate. The cut-off for this course are around 90%+ every year.
Your compulsory subjects are:-
a) Maths
b) Chemistry
c) Physics
d) Biology.
The link below will provide you with further information:-
http://www.sxccal.edu/admissions/SXCAdmission2018/UG8102/EligibilityCriteria.htm
If you face any other doubt, kindly revert back!
I hope this has helped you.
Good luck to you.

Hi,
Please find the link below:
https://www.shiksha.com/bba/course/bba-in-aviation-management-aptech-aviation-and-hospitality-academy-kolkata-a-j-c-bose-road-692
The webpage of this college is silent about the fee charged for various courses. It would be recommended to get in touch with the college officials for the detailed information regarding the fee structure.
Regards.

yes, there are many opportunities you can get once you have completed your MBA.
You can apply by yourself to companies outside India and there are chances you can get placement through your college itself.

Total number of seats: 200. The official website has not mentioned anything regarding the SC category. Thanks.

Yes, there is no MBA course in NSCBOU. But don't worry. You can opt for MBA from IGNOU. IGNOU is better than this college and its degree has more value. The form for the exam will be released around or before December and you will have to give the OpenMAT exam to take admission.

No, you may have to take WBJEE for that and you will get a seat only if there are seats available. There is no other way.