On referring to previous year cutoff stats we can clearly observe that the minimum cutoff percentile score for OBC-NCL was 74.31 percentile so on comparison with your percentile score (71.9) it is clear that you haven't cleared the minimum cutoff score so you aren't qualified in JEE Mains as of now and wont be able to appear in Advanced exam. And to get admission into NITs , qualifying JEE Mains is a must so unfortunately you won't be able to get admission into any NIT for now. But you can focus for the next Attempt and do your best to get your desired college.
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