Please restructure your question.Do mention the name of University from where you wish to pursue your M. A Political Science as different universities have different norms. Do mention that so that I could clarify your doubt easily.

For M. A in Political science in Delhi University, you need to have B.A in political science and that too from DU in case of Merit based admission but in case of Enterance based admission you need not to have political science. For further information you can take help from the below mentioned link :-

https://university.careers360.com/articles/du-pg-eligibility-criteria

Good Luck