Hello Swecha

NEET PG is a national level entrance exam and is conducted for admission to Master of Surgery and Doctor of Medicine courses in the medical colleges of the country.
The entrance exam is used for admission to 50% All India Quota seats and 50% State Quota seats.

Before appearing for the exam it is important to know the detailed eligiblity criteria to appear for the exam. Candidates are required to fulfill the eligibility criteria to be eligible to appear for the exam. Those who do not fulfill the eligibility criteria are not allowed to apepar for the entrance examination.
The Eligibility Criteria is set by National Board of Examinations (NBE).

NEET PG Eligibility Criteria is as follows-
1. Candidates seeking admission to the Postgraduate courses must possess MBBS Degree or provisional MBBS pass certificate from an institution recognized by Medical Council of India (MCI).

2. As per the NEET 2019 eligiblity criteria, candidates should have completed the mandatory rotatory internship of 12 months on or before 31 March 2019. Candidates who were likely to complete the internship were also eligible to appear for the exam.

3. Candidates must possess the provisional or permanent registration certificate of having qualified the MBBS degree. Certificate should be issued by Medical Council of India (MCI) or State Medical Council (SMC). Also, candidates were required to carry the Medical Council of India/State Medical Council registration certificate at the NEET PG examination centre on the day of exam. The Registration Certificate is also required during admission.
NEET PG 2019 exam was conducted on 6 January 2019.

As I have already mentioned that there are 50 percent All India Quota seats and 50 Percent State Quota seats for admission through the NEET PG exam. So, it is required to mention that Andhra Pradesh and Telangana has started participating in the 50 percent All India Quota scheme and candidates belonging to these two states are also eligible for 50 percent All India Quota seats.

Jammu and Kashmir candidates are not eligible to participate for admission in the NEET PG 50 percent All India Quota seats. However, candidates who were nominated by the Government of India (under Central pool seats) for MBBS course in medical colleges of Jammu and Kashmir are eligible for admission to the 50 percent All India Quota seats. Also, such candidates must submit an affidavit which declares that they were nominated by Government of India for admission to MBBS course in medical colleges of Jammu and Kashmir.

NEET PG 2019 exam was conducted on 6 January 2019 in Computer based mode. Now, if you are asking about the NEET PG 2020 exam, then you must possess the MCI/SMC registration certificate by then as no candidate is eligible to appear for the exam without possessing the registration certificate.

Good Luck!