Assuming asking for AIIMS, As per the eligibility criteria You should have be studied Physics, Chemistry, Biology and English as mandatory subjects in their 10+2 level.

candidates belonging to General and OBC categories should have secured a minimum of 60% marks in the aggregate of aforesaid subjects and those belonging to SC, ST and OPH categories should have obtained at least 50%.

For further you can go through with given below link.

AIIMS Eligibility Criteria

Good Luck!