Hello Aspirant,

This year in the wake of COVID-19 Ministry of education announced relaxation in class 12th 75% criteria, means now the student should must have passed class 12th to become eligible for admission to NITs through JEE-Main but note that this relaxation is only for this year not for next year(till now).

From next year the criteria of 75% will be applicable and according to this criteria the candidate must have passed class 12th with minimum of 75% marks overall not particularly in PCM. So if you re having 78% overall marks then you are eligible for JEE-Main.

For more details refer to the link given below :-

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

However I would recommend you to use JEE-Main College Predictor to predict the chances of your admission in different colleges  based upon your percentile and category :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

I hope this information helps you.

Good Luck!!