ICFAI Business School, Mumbai

If you really want to pursue MBA from Kolkata, why aren't you opting for Unitedworld School of Business? This institute has been maintaining a 100% placement record since its establishment and has a multi-layer placement cell for providing regional, national and international placements.
Here is a list of some of the companies that have recruited students from this institute in the past:
Google
Coca-Cola
Nestle
Parle
Justdial
Oyo
Pran Dubai
Times Group
Paytm
Airtel
JK Tyres etc.
Placement is the main USP of this college. Even during this hard times when other colleges are failing to provide any placement opportunities to its students, Unitedworld School of Business is maintaining a 100% placement record.

Yes, PGPM does have dual specialization. The specialization could be a combination of Marketing + Finance, Marketing + HR, Marketing + Operations, Marketing + IT, Finance + HR, Finance + Operations, Finance + IT, and so on. 2 subjects of each specialization. There is also majors + minors of specialization wherein you could choose or select 3 subjects of one specialization which would be your major specialization and anyone subject of either banking, operations, finance and IT which would be considered as your minors specialization, both the ways of selecting subjects are good. Selection of the subject is usually based on the kind of field in which you want to make your career. Sometimes at the time of interviews or campus selection for placements, selection of subjects might make a difference in your selection for a particular post and for a specific kind of organizations. For example, in order to make a career in banking, it is better to choose subjects like Banking Service Operations, Overview of Banking, and Marketing of Financial Products.