Dear student. 

Greetings. 

The first government corgi that comes to mind when asked about a government college in kolkata is IIM. But, he education cost in IIM Kolkata is really high. Also, many colleges provide one year course in MBA, which is considered inferior. So, the best college in aspect of economical fee structure and government owned would be University of Calcutta. It has a fee structure of Rs. 1.6 lakhs which is really low compared to other colleges which offer MBA. It accepts a lot of Management entrance examinations such as CAT, MAT etc. So, it is w good option for you. 

Thank you. 

All the best.