Hello Aspirant , Hope you are doing good.

You didn't mention in which stream you need to pursue PG. Based on your profile as it is of science . There will be entrance exam for Post graduation .

As you didn't mention specifically, I am just giving the general view

PG Entrance Exams like  NEET PG , AIIMS PG

NEET PG eligibility :

There is no age limit for the examination

Candidates must hold a current MBBS degree or a provisional pass certificate in the same subject. Registration with the Medical Council of India/State Medical Council is required, and proof of registration should be provided at the time of counselling. At the time of counselling, candidates will be asked to produce the original certificate of one year of rotating internship, including the start and end dates.

For more details can visit the given below link:

https://medicine.careers360.com/articles/neet-pg-eligibility-criteria

AIIMS PG entrance exam - for the details can visit the link given below

https://medicine.careers360.com/exams/ini-cet

Hope this information helps you.

All the best.