Hello aspirant,

The top 20 percentile of class 12 boards will be considered for admission to the 31 NITs, 23 IIITs and 23 GFTIs even if they don’t score the prescribed minimum 75% marks (65 % in case of SC, ST, and PwD), in class 12 or equivalent. Consequently candidates seeking admission to the NITs, IIITs, and CFTIs may fulfill any of the two conditions for admission – (a) score minimum 75% marks, or (b) be ranked in the top 20 percentile in their respective boards. Since each board has a different scoring pattern, the cutoff marks for the top 20 percentile candidates may vary across boards. 

Hope it helps!!