Hi Varsha, hope you are doing well, sorry to say this but you have very fewer chances to get any nit. But you can try for iiit as you have good SC rank. I also suggest you to go through the rank predictor to know more about your admissions through jee mains in careers. The link is provided below, kindly go through it

https://engineering.careers360.com/jee-main-college-predictor

I think it helps you!!!

Keep Smiling:)

Wish you good luck!:)