I don't think that you are fulfilling any criteria for getting admission into nit.

First of all you are having only 57 % in 12th class which is less than 75% criteria for getting admission in nit's. Let's say that you managed to get over 75 % marks in 12th. Still you won't get in MNIT JAIPUR , as your rank is too much high , even the category rank , it is far above than required rank..

So you won't get admission in any nit's.

thank you