Yes,it is mandatory.But,it's not like you have to score 50% of marks in every single exam scheduled in college,I mean it's great if you do so.If not,you can compensate the marks in next exam to make aggregate 50%,so that you will be eligible for university exams. and yes,it the “internal assessment “which is type of score medical college sends to university and thus,makes the students appear for final university exams.so,yes you will have to score 50% of internal marks in not only for the frist year but for all consecutive years of MBBS.
Lakhan Gawade, studied at Bachelor of Medicine and Bachelor of Surgery Degrees
Source: Quora Digest
Yes, it is mandatory.