Get into IIT NIT do I need 1)75% overall in 5 sub 2)75% overall in PCM 3)at least 75% in each 5 sub 4)at least 75% Phy. 75% chem 75% math ?

In order to qualify for JEE Advanced you must clear JEE Mains & you must be in the top 20 percentile students in the Board from which you are giving class-12th Examination. For calculating the aggregate marks for calculating the top 20 percentile they will consider Physics, Chemistry, Mathematics, English & another language course, if in case you have 2 more language courses besides English then the one in which your score is maximum will be considered. The top 20 percentile for each Board is calculated separately & the approximate marks which you need to qualify for JEE Advanced are as follows: Category Marks(out of 500) GEN 376 OBC 374 SC 362 ST 326 PwD 326 Hope it helps All the Best!