Hi Nandini, hope you are doing well, with your rank of 55,769 you can not expect any of the iits and nits even though you are of obc category. I suggest you go for some private colleges like lpu which are good both in placements as well as academics. To know more about the admissions through jee mains, kindly go through the rank predictor in careers, the link for rank predictor is provided below

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

I think it helps you!!!

Keep Smiling:)

Wish you good luck!:)