I am in final year of graduation in psychology. So if I go for pg then which would be a best college for me to study further?
Top Institutes offering M.Sc. Psychology are:
Allahabad University
Amity University
Awadhesh Pratap Singh University
BHU.
Hope this helps you.

Here is a list of top colleges in India that have MSc in Psychology:-
Christ University, Bangalore
Presidency College, Chennai
Banaras Hindu University
University of Calcutta
University of Hyderabad
Pondicherry University
University of Allahabad
Loyola College of Social Sciences, Trivandrum
Hope this helps!
Good luck!