Dear Mayank, if I speak honesty your marks is very low as per your category. If you really want to get NITs and IITs than you have an option to improve your marks in next attempt if you want to waste your time then you can apply for private colleges like LPU, CU, AMITY, SHARDA, VIT, BITS, SRM and others. Choose wisely dear believe your self and try to hear the voice of your soul and mind, you get your answer and also discuss with your parents too.

All the best dear Mayank and have a bright future ahead.