Colleges in Kolkata

No, as far as I know the basic criteria is B.Sc Physics Honours.
However, you can try other colleges across India including IIT, NIT, IISC. You need to qualify JAM only.

Hi Abhijit,
Your percentage must be minimum 45% for taking admission in BBA, for Big and Reputed colleges you must have to score at least 80%.
You can check the eligibility of BBA at below:
https://www.distancelearning.edu.in/university.php?tid=0&pid=110&cid=1519&ctype=3&pg=Bachelors&fn=Management&-1

You need to have minimum 60% to be eligible for biotechnology.

Work experience is never counted as a step up for education courses. The work experience will help you to understand the MBA course better than any regular student who do not have work experience. Yes, you are definitely eligible for any postgraduate courses after Degree course. Wish you a good luck for your future.

For admission in MA in history, you need to have BA (Hons).

Hi,
The webpage of this college is silent about the examination dates.
It is advisable to get in touch with the college officials for detailed information:
http://www.caluniv.ac.in/student/student.html

For such specific information, you will have to check with the university as they are the right & reliable party to suggest about the same.

No, there is no problem if you take one year gap but you need to justify the gap and also provide a gap certificate at the time of admission.

After completing your 12th, you can do BBA or BBM with special subject finance where you can study both business studies and finance too and if you want to do masters, then after completing your course, you can do MBA in finance also.

Hi,
There are many private institutes that will help you with the subject mentioned. Also there are online courses for the same. Courses like film making are available. I prefer you to start making some travel videos and upload it on YouTube.