Hi,

In NITs only 5% of seats are reserved for PWD candidates in each category, i.e., General, GEN EWS, OBC NCL, SC, and ST.

And for qualifying JEE Mains, if you are a ST PWD candidate you need to score a minimum of 12 - 17 marks (i.e. answer 4-5 questions correctly). If your score is in this range and likewise your rank then you have a good chance of getting into any of the NITs.

And as for IITs, 58 seats are reserved for ST-PWD candidates. Going by previous years data, a candidate belonging to this category has to score an average marks of 17.5, which means minimum marks required in each subject is 5.

Hope that was helpful.

You can check out the qualifying criteria for JEE Mains here -

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

...and for JEE Advanced, here - https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria