The possibility of pursuing a Master's degree in Political Science with a BA (Hons) in Hindi and Political Science (as a generic elective in 3 semesters) depends on a few factors,

Universities offering M.A. in Political Science programs typically require a minimum percentage in a Political Science undergraduate degree. While your BA (Hons) is in Hindi, having Political Science as a generic elective strengthens your case.

Some universities might have specific requirements regarding the number of semesters a subject was studied. Three semesters might be considered sufficient by some universities, while others might require Political Science for a longer duration.

I hope it helps!