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As per your query, JEE Main qualifying cutoff is in range of 0-2 percentile approx 2-5 marks for PWD student. but to get seat in NIT 50-100 marks to secure best NIT and Best branch.

To know more information about JEE Mains cutoff 2022 checkout given link below:
https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Hope you found it helpful
All the best!!!