TO BE ELIGIBLE TO SIT IN IIT EXAM , A STUDENT MUST GET 60% AGGREGATE MARKS IN QUALIFYING EXAM (QE)?

IS IT A NECESSITY TO GET 60% IN SCIENCE AS WELL . GUYS I FELL SERIOUSLY ILL DURING MY SCIENCE EXAMS AND I AM NOT SURE WHETHER I WILL RECEIVE THE SAME IN SCIENCE BUT IN AGGREGATE IN ISC I WILL GET MORE THAN 75%. AM I ELIGIBLE TO SIT FOR IIT EXAM ." PLEASE ANSWER FAST . I AM QUITE DESPERATE" .MOREOVER IN IIT BROCHURE IT WAS WRITTEN "Candidates belonging to GE,OBC,DS categories must secure at least 60% marks in aggregate in their QE " AND IN ISC AGGREGATE MEANS (ENGLISH + BEST 3 SUBJECTS) PLESSSSSSSSE HELP ."THANKS A TRILLION"