Hey aspirant,

If 45k is your category rank then I guess you have less chances of getting nits even in CSAB. but that isn't the end as we all know that the cutoffs changes every year on the basis of few factors. So for a better idea please refer to the link mentioned below-

https://www.google.com/amp/s/engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis/amp

Also there are many more private colleges too in which you can give a shot like-

Bits pilani

Srm

Vit

For more colleges you can use our college predictor tool using the link mentioned below-

Hope it helps.

Good luck.