Hi

In 2021 , To be eligible for NITs, IITs one needs at least  75% marks in aggregate in class 12 if belong to general or obc category or at least  65% marks if belongs to SC/ST or  must be in the top 20 percentile in  class 12 examination.

5 Subjects to be considered for calculating aggregate percentage are :-

*Physics

*Chemistry

*Mathematics

*A language

*Any subject other than listed above

And when one gives improvement exam to meet the above aforesaid % then you need to give improvement examination for all the above 5 subject otherwise it will not be considered

so, you will have to give improvement examination of all the 5 subjects if you want to be eligible

Thank you