IGNOU is a central university making it one of the best universities that offer distance education. The study materials are excellent and are written by top-notch professors from various universities. They are written and proofread by professors from renowned universities like JNU and IITs. 

Before this, they used to provide books by well-known authors. But when the syllabus was revamped they started printing the study material written by very experienced professors from well-known universities. People prefer these study materials for other competitive exams also.

If you cannot go for a regular program, an MA in political science through IGNOU is the best option.