Hello Sayyad!
There a vast number of colleges in India offering ba mathematics . Some of the colleges across India are - *Fergusson college - Maharashtra
* Delhi University
* Maharaja Sayaji Rao University, Baroda
* St. Andrew's college
* Kamla Nehru College for women
* Christ University
* St. Xavier's College
Etc.,
But, you will have to specify the state in which you want to pursue this course, in your question. Sorry, but you haven't mentioned the complete details of the state in which you want admissions or a particular college you want to know about. Hence, it's a request kindly restructure your question and ask again in order to know better.
Good luck!