Simple answer. Firstvof all it is not after 1st semester. A student appears the University exam after 1 year. If he fails in 1st attempt, he will go on appearing till he clears all three subjects. After clearing all three subjects, he will be promoted to 2nd MBBS.
Prasan Kumar Hota, Professor of Surgery, & a former Colonel of Indian Army
Source: Quora Digest
Simple answer. Firstvof all it is not after 1st semester. A student appears the University exam after 1 year. If he fails in 1st attempt, he will go on appearing till he clears all three subjects. After clearing all three subjects, he will be promoted to 2nd MBBS.