Ask & Answer: India's Largest Education Community

To be eligible for PhD you need to pass master's / M.Phil. You need to sit for an entrance exam. For specific criteria and admission details you may contact the college officials directly.
Some of the universities offering PhD :
-Delhi Technological University (DTU)
-Goa University
-Anna University
-Acharya Nagarjuna University
-Banaras Hindu University
-Indian Institute of Science
-Jadavpur University
-Jain University
-Birla College of Arts Science & Commerce
For more, you may refer to the below link :
https://engineering.shiksha.com/phd-courses-in-india-categorypage-2-68-1-0-0-1-1-2-0-none-1-0
While selecting the best, you need to check some of the important parameters such as recognition, year of establishment, syllabus, faculty, fees etc.

Though all the colleges are good in terms of academic structure but being an alumni of LPU let me explain the things in detail. The below stated factors make it one of the most refined campus:-
Courses: Not just engineering, the university is also known for programs like MBA, Business Management, Design, Hotel Management, Law, Pharmacy among others. Placement : LPU takes pride in its students' excellent placement record. Tanya Arora, a promising third-year B.Tech Computer Science and Engineering student at the university bagged a job with Microsoft in 2019, at a salary of Rs 42 lacs. Thousands of other LPU students are working with industry bigwigs like Google, Amazon, Capgemini and more. Cognizant, ranked 3rd among IT companies in the world, alone has hired 2226 students from LPU in just three years. Keeping up with its high standards, over 550 national and international companies visited the campus in 2019, including Hewlett Packard, Adobe, Xerox, Abbott, IBM, Cognizant, Microsoft any many more. Infrastructure :LPU also has specialised labs in collaboration with Google, SAP, Intel, CISCO etc. In the campus. Due to a strong industry interface, a large number of senior industry professionals regularly share their expertise with students further make them industry-ready. LPU has ultra-modern high-tech labs dedicated to every department, smart classrooms, country's the largest auditorium, Olympic ready sports complex, shopping mall, hospital and students run hotel. Faculty: There exist more than 3600 faculty & staff members imparting education at LPU. Many of them come from IITs, NITs and renowned International universities such as Harvard & Stanford. Experiential Learning: studying at LPU is not just limited to textbooks and classrooms. Students get to learn through live projects and experiments. Promoting experiential learning, students at LPUs Department of Mechanical Engineering have developed driverless cars. In the Computer Science Department, it is compulsory for students to create customized mobile apps while the fashion technology students organize fashion shows at national and international level. Diversity : With over 30000 students from 28 states, 9 union territories and 50+ countries, LPU is not less than a Mini World in the state of Punjab, India. I believe this helps you in making a choice.