Hey Kalyani,

Hope you are doing well!

Well dear getting NIT Raipur with 50 percentile is very difficult and if by chance you even get it you won't get a branch worth having.

So,better you keep applying for other exams.

Also,I am providing you with the link of the college predictor below that will help you in finding all the probable colleges under your rank:

https://medicine.careers360.com/neet-college-predictor

Hope this was helpful!

All the best!

Keep Smiling :p