M.A Political Science

As such, there are no minimum eligibility criteria for IELTS set by the conducting bodies of IELTS. Anyone who wishes to pursue higher studies abroad or wants to work abroad can attempt the IELTS exam (both Academic and General Training). However, candidates should always check the eligibility criteria set by the educational institution or organisation where they are applying.

It would depend on the university's eligibility criteria. Some universities are liberal. Some are not.

Firstly, check whether you are eligible for the same or not. Then prepare for the exam with previous year paper and related study material.

Yes, you can.
MA Political Science: Eligibility
Bachelor's degree in any stream preferably Arts and Humanities. Students with a graduate degree in other streams can also apply. Minimum marks required vary from 45% to 55% in graduation and may vary for different universities.