Hello Minisuresh, There are many graphic designing colleges but the best are as follows - 

1. Indian School Of Design And Innovation, Mumbai

2. Sir J. J. Institute of Applied Art, Mumbai

3. Symbiosis Institute of design, pune

4. Reliance education, Mumbai

5. Pearl Academy, Delhi

6. College of Fine Arts, Karnataka Chitrakala Parishath

Good luck

Hi Minisuresh,

The following are top institutes/colleges which provides graphics designing course:

• National Institute of Design, Ahmedabad-Courses-Graduate degree programmes in Design(B.Des), M.Des.

• IDC, IIT, Bombay- Courses-integrated B.Des programmes in Design, M.Des.

• Pearl Academy,(Delhi,Mumbai,Jaipur)-Courses-UG, PG, Diploma(Morning & evening session), MA,Professional Diploma.
• NIFT, Delhi-Courses-B.Des, B.FTech, M.Des.
• MAEER'S MIT Institute of Design, Pune-Courses-B.Des, M.Des.
• Srishti School of Art Design and Technology(Banguluru, Pune,Trivadrum)-Courses-B.Des,M.Des.
• Indian School of Design and Innovation, Mumbai-Courses-Ungergraduate Diploma, Professional Program.
• GD Goenka School of Fashion and Design, Mumbai-Courses-B.Des.

All the best!!