Hello Buddy! Hope you're doing good.

Yes, the admission into M.A. Political science through merit is taken if you are not giving any entrance or had scored bad in entrance. Well it totally depends on any particular institutions norms. Some of the institues for the course are provided in the website given below :-

https://university.careers360.com/colleges/list-of-ma-in-political-science-universities-in-india

Hope this will help you.

ALL THE BEST! WORK HARD !!