Akash, NEET is the mandatory entrance examination for admission to MBBS. Once you appear for NEET and get a seat in MBBS, you complete the course in 50 months and complete your mandatory rotational internship. Now NEET PG will be scrapped in favour of NEXT whose details we do not have yet. So NEXT will come into force from 2021. Stipend that you get in MBBS Intersnhip depends on the State that you pursued your MBBS from. It is decided by the State Medical Council. And regarding the salary,a Post Graduate earns more than a Graduate who is being paid during his/her internship.