my son has secured 93.12 percentile in Jan mains 2020 he belongs to Karnataka and SC category what is the scope of getting top nits
You can calculate your expected rank by using the below formula:
(100-your total percentile score)*869010/100.
Here 869010 is the number of candidates appeared for the January session of exam.
So your expected rank would be:59,788.(AIR)
Now if we consider your category and state quota then yes , you definitely have chances in top NITs with this rank but as you didn't mention branch you prefer so for having a clear idea of colleges which you can have with this rank ,you can use our college predictor tool from the below link:
Best of luck.