Hello Shashank,

Good to know that you have decided to choose Political Science as your subject for further studies. Make the right choice by joining the institution of your preference, with due consideration on all of the merits and demerits, but make sure that you end up enjoying your course of study with this Master Science. There are plenty of good universities in india for political science.

For Graduation - 

1..St. stephen’s college, Hindu college, Ramjas college, Hansraj college (D.U.)

2..St. xavier's college (mumbai)

3..Lady shri ram college, Miranda house((D.U.)

4.. Banaras hindu university

5.. Punjab university(chandigarh)

6..Jamia millia islamia

For Post Graduation : 

1..J.N.U.(delhi)

2..Hyderabad central university

3..Delhi university

4.. Banaras hindu university

5.. Jamia millia islamia (delhi)

For Research - 

1..J.N.U (delhi)

2.. Banaras hindu university

3..D.U

However before making a choice keep various other factors in your mind like geography, climate, rating, facilities and faculty, fee, etc. 

Hope you find this information useful, however in case of any further query, feel free to comment. 

All the best....