I am providing here the best colleges which have the best student and Faculty ratio colleges as well as Deemed University in the south India (Kerala is provided below for other colleges the links will be provided)below:

RSET Kochi - Rajagiri School of Engineering and Technology

TKM College of Engineering, Kollam

Sree Chitra Thirunal College of Engineering, Thiruvananthapuram

GEC Barton Hill - Government Engineering College Barton Hill

Indian Naval Academy, Kannur

Rajiv Gandhi Institute of Technology, Kottayam

For more colleges in Kerala visit the link below:

https://engineering.careers360.com/colleges/list-of-be-btech-colleges-in-kerala

For more colleges in Telangana visit the link below:

https://engineering.careers360.com/colleges/list-of-be-btech-colleges-in-telangana

For colleges in Tamil Nadu visit the link below:

https://engineering.careers360.com/colleges/list-of-be-btech-colleges-in-tamil-nadu

For colleges in Telangana visit the link below:

https://engineering.careers360.com/colleges/list-of-be-btech-colleges-in-telangana

To know more about the career in BTech visit the link below:

https://www.careers360.com/courses/b-tech-bachelor-of-technology

I hope this answer helps. All the very best for your future endeavors!