Hello.

To take admission into PhD Psychology  you must have  a 50% in Master's degree  of Psychology.

Some of the top institutes which provide admission to Ph.D. in Psychology are:

Some of the best institutes  are-

Amity University, Lucknow
Allahabad University, Allahabad
Punjab University, Chandigarh
Banaras Hindu University, Varanasi
Kurukshetra University, Kurukshetra

To get admission  into these institutes,  you must give an entrance  test, which are RAT or JRF , based on which,  you may get a seat in the college.