Hello prasenjit

There are 49 or 50 colleges in Kolkata which offer CSE .I am providing you the list of top 10 colleges :

1 University of engineering and management 

2 JIS College of engineering

3 Jadavpur university 

4 Narula Institute of technology

4 Netaji Subhash engineering college 

5 Guru nanak institute of technology

6 Maulana Abul kalam azad institute of technology 

7  Heritage institute of technology 

8 Budge budge institute of technology 

9 Government college of engineering and ceramic technology

10  Techno india college of technology 

Hope it helps!