Hey nishchal.

Here is a list of a few private top colleges for Btech in India.

Birla Institute of Technology and Science, Pilani  

Thapar Institute of Engineering and Technology, Patiala  

Vellore Institute of Technology

Birla Institute of Technology, Mesra  

BMS College of Engineering, Bangalore  

Manipal Institute of Technology, Manipal  

PSG College of Technology, Coimbatore  

Amrita School of Engineering, Coimbatore  

Ramaiah Institute of Technology, Bangalore  

RV College of Engineering, Bangalore  

 SASTRA University, Thanjavur  

SRM Institute of Science and Technology, Chennai  

Best of luck