In order to be eligible for NITs/IITs and IIITs you should have 75% marks in your board exam or you should be in top 20 percentile.

For 75% it is not necessary to give improvement in all the subjects.

For Top 20 percentile you have to give improvement in all the subjects.

Good Luck!!

There are 2 criterias and out of them you will have to fulfill any one as the first one is you must have got 75% or you should be there in top 20 percentile so if you go for 75% then it is not compulsory to give improvement in all subjects so the jee main roll number would be there but if you are following top 20 percentile rule then you cant give improvement in 2 subjects and jee main roll would not be given.

To check the complete eligibility of Jee main 2018, you can go through the below link -

Eligibility 2018

Hope this helps!!!