Heh Ashutosh. 

The following link gives all information about bsc cosmology

http://www.indiastudychannel.com/resources/167229-How-to-become-a-cosmologist.aspx

List of astrophysics colleges in India;

Indian institute of astrophysics , Bangalore

Gulbarga University -Gulbarga-West

Karanataka city college - Bangalore

R v centre for cognitive technologies Bangalore

St Xavier's college Kolkata

Rashtrasant tukdoji maharaji Nagpur University - Nagpur

Saha institute of nuclear physics -kolkata

Institute of physics - Bhubaneswar Orissa

Punjab University

college of science and technology - Visakhapatnam

Berhampur University - Berhampur Orissa

Indian Institute of geomagnetic

Bangalore university

University of Lucknow

Mahatma Gandhi university

Osmania university

Patiala university

University of Chennai

University of Kolkata

Shivaji university

S N Bosenational centre of basic sciences

The link below will give you information about astronomy.

http://scipop.iucaa.in/beastronomer.html

Hope this helps. All the best.