West Bengal

Yes, it's worth joining both in terms of ROI and Future projection too.

It's a decent B-School in Eastern India belonging to MDI Family with its roots in Gurgaon.

Pros -
Extension of MDI Gurgaon
Promoted by MDI Society
Excellent placements in 3rd Batch 9.2 average
Infrastructure is good
One semester in MDI Gurgaon Campus
Ease in Education Loan by SBI Scholar Loan
Cons -
Location.

The candidate should have passed 10+2 with PCBE as compulsory subjects from a recognized Board/Council.
Candidates should possess a minimum 45% marks in the qualifying examination.

Yes, but in Maharashtra, it is not compulsory. Here "MH-CET law exam" is needed.

You can consider the following colleges:
University of Kalyani
Ananda Mohan College

Here is the eligibility criteria:
A candidate for being eligible for admission to the BMS Degree Course shall have passed HSC Examination of the Maharashtra State Board of Higher Secondary Education or its equivalent examination or Diploma course in any Engineering Branches with two years or three ye

Yes, you can opt for BCA through distance education.

Hi Santosh, in the first year you don’t have to do the internship as they have the internship in the second year. The criteria for placements are good. Different companies come for campus selection. As per my knowledge placements are good in Amity Kolkata.

The best college for BCA in Kolkata is Institute of Engineering & Management (IEM) Salt Lake. For 110 students, this college has generated 223 offer letters for its 2018 pass out batch. It is the oldest private college in West Bengal which is affiliated to MAKAUT.
http://iem.edu.in/admission/