Hello,
PhD in Journalism and Mass Communication is a doctorate level course.
The main aim of this program is to train professionals and teachers in the chosen area of their study to provide new and original insights.The basic eligibility criteria is that students must have cleared their masters with minimum 55% aggregate marks.
The main topics in this course are
Advertising Theory

Theory of Culture and Media

Ethical Issues in Journalism

Law and Ethics of Telecommunication

Contemporary theory and issues in journalism

History and related topics of Mass Communication and Journalism

Some of the top universities which offer this course are

1. Aligarh Muslim University
2. Amity school of communication, Noida
3. Amity University, Gwalior
4. Andhra University

Here's a list of some of the top colleges in India for this course
https://media.careers360.com/colleges/list-of-phd-media-journalism-colleges-in-india

Hope it helps