Thanks for the question 

If you had specified the place where you desire a college then it would have been better. 

However, i am enlisting few good colleges which provide B. Sc with mathematics hons. 

Acharya Jagadish Chandra Bose College

Acharya Narendra Dev College

Acharya Prafulla Chandra College - APC College

Akal University - AU

Al-Falah School of Physical and Molecular Science

BHU - Varanasi

AMU - aligarh

All the best