I am pursuing m.sc mathematics and I want to know how I get admission in p.HD and what are the best institute and criterion for admission

Hello,

Start your course at iit. See what topics interest you. Speak to your seniors and profs. First decide whether you want to do PhD here or abroad. Because preparation for both are vastly different. Once you fix that you can start preparing accordinglyVarieties of university in India

University level institutions in India fall into four general categories:

• Central and State Universities : these are public institutions, established and supported by national or regional government. State universities often serve as local hubs for higher education, offering degrees through large numbers of affiliated colleges.
• State Private Universities : as their name suggests these are privately established and funded institutions operating at state level. They are not typically allowed to operate through affiliated colleges.
• Deemed Universities : these are high-performing institutions that were not established as universities, but have been officially recognised as having an equivalent status.
• Institutes of National Importance (INI) : these are India's premier research and training universities, established by acts of parliament. The majority focus upon science, technology and engineering fields and are further organised into the Indian Institutes of Technology (IITs) and National Institutes of Technology (NITs). Admission to an INI is typically very competitive.