Dear aspirant,

In order to get into post graduation, that is MD or MS, first you need to complete your undergraduate course, MBBS. To get into MBBS, you need to appear for NEET UG examination usually conducted on the first Sunday in the Minth of May every year. After you procure your MBBS seat and complete the 4.5 years long course, you are eligible to give the NEET PG entrance, usually conducted on the first Sunday of January every year. The results of this examination and the merit you score will help you get into medical  post graduation.

Hope that answers your query.

Good luck

Cheers!