Hey  Shivam!! Please be more specific in your query. You haven't mentioned your exact percentage or JEE score. If it is below 75 then you are not eligible for admission in IIT but are still eligible for NIT. But board percentage is only to get eligible. Admission in NITs and IITs is done on the basis of your JEE Mains and Advanced rank respectively. So you need to check your JEE rank and then accordingly decide what's good for you. Hope this helps 

Hi Shivam,

                I am here to answer your query. I am sorry to say this but it is compulsory to get 75% in 12th or you should among the top 20%le students of your board.  to join NIT/IIT. It is not possible to get a seat in any NIT/IIT if your percentage is less than 75% even though your rank is so good in JEE. To know more about eligibility for IIT please click on the link  https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria

I hope this will be helpful to you.

All the best for your future.

Thank you.