for general/obc candidates you must have 60% aggregate marks in physics, chemistry, biology, and English and for sc/st/oph 50% is the criteria. which means total aggregate in these 4 subjects must be 60% no separate cutoff total percentage of these 4 subjects must greater than 60%.

for more info you check this link:- https://medicine.careers360.com/articles/aiims-mbbs-eligibility-criteria