Dear Ankit,

According, to the eligibility criteria you should have 75% marks in your boards exam or you should be in top 20 percentile in order to take admission in NITs/IIITs and GFTIs 

There is a relaxation of marks for only SC and ST category students.

You will be eligible for IIIT Hyderabad as it requires minimum of 60% marks in Maths, Physics and Chemistry in Class XII.  

You can also apply for other colleges through JEE Main like DTU and NSIT as it consider JEE Main marks to provide admission and counselling is through JAC Delhi

Good Luck!!