Hello student  I request you to please help me with your preferable college/University so that I can check and provide you the exact information as entrance examination vary from college to college.
Students who have a masters degree are eligible for admission into PhD course.

For more updates refer to the link mentioned below - https://www.google.com/amp/s/www.careers360.com/courses/ph-d-doctor-of-philosophy/amp

Feel free to comment if you have any doubt
Good luck