Hello Kalyani Good afternoon. 150 + marks under SC category is really good marks to get selected for next stage of NTSE. careers360 has calculated expected cut off marks for 2020 , depending on some previous year cut offs. As per this marks,  The expected cut off marks for SC category students is 125+.
So as you said,  your marks are much more than this cut off,  so you have really good chance to get selected for NTSE stage 2.
But still I'll suggest you to wait for final results.
Till then best of luck.
I hope it will help you more.
Thanks.

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