Hey Sakshi.

No, there is no requirement of any specific percentage of aggregate in your MBBS degree as per the NEET PG eligibility criteria.

• As per the eligibility criteria you must possess MBBS degree or provisional MBBS pass certificate recognized by the MCI and the  Registration Certificate- permanent or provisional issued by Medical Council of India (MCI) or State Medical Council (SMC).
• You should have completed or likely to complete 12 months mandatory rotatory internship on or before March 31, 2019  

Best of luck!