There are colleges which offers BA course in Mathematics which you can opt for if you have IA with Mathematics.

Some of the BA Mathematics colleges in India visit the link below:

UPRTOU Allahabad - UP Rajarshi Tandon Open University

Singhania University, Jhunjhunu

DHSGSU Sagar - Dr Harisingh Gour Vishwavidyalaya

DHSGSU Sagar - Dr Harisingh Gour Vishwavidyalaya

Kakatiya University, Warangal

For more BA Mathematics colleges visit the link below:

https://university.careers360.com/colleges/list-of-mathematics-universities-in-india?degree=B.A.

To know more about Mathematics visit the link below:

https://www.careers360.com/courses/mathematics-course

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