Hey, in Presidency College Chennai there is BA Political Science Course. You will have to submit the Application Form in person or through post with necessary enclosures which should reach: 

THE PRINCIPAL,

PRESIDENCY COLLEGE(AUTONOMOUS),

KAMARAJAR SALAI,

TRIPLICANE, CHENNAI – 600 005.

The application form with all particulars and enclosures reaches the Admission Section within the date and time specified. No delayed forms will be entertained. I hope this helped.

Best wishes