Hello Saurav, 

Some of the very good colleges in patna are listed below. Please have a look: 

1) National Institute Of Technology, patna

2) Patna Science College 

3) R.P. sharma Institute of Technology 

4) Maulana Azad College of Engineering and Technology

5) Department of Computer Science and Engineering, Indian Institute of Technology, patna

6) Netaji Subhas Institute of Technology, patna

7) Birla Institute of Technology Extension Centre, patna

8) Bharti Institute of Management and Technology

9) Dr. Narendra Institute of I.T. and management 

You can visit the official website of these colleges in order to get more information regarding them.

All the very best!