Hyy ankit, 

There is no such thing as school category, and i guess you are asking that if you got 50 marks in Clat 2018 in schedule categories like SC/ST then what are your chances of getting a NLU then according to our prediction there are no chances of getting a low NLU just for your satisfaction, 

Please check the previous years cutoff lists. This will give you fair idea.

Below is the link to clat rank predictor. Please remember that this is just the prediction and not the guarantee.

Https://law.careers360.com/clat-rank-predictor?icn=clat-rp&ici=exit-intent

All the best!