Hello Sir/Mam,

See different IITs have different cut-offs for Open-PwD candidates but yes if your son secures his AIR under PwD quota under 100 then he can get good IITs like IIT Delhi IIT Kanpur, IIT Kharagpur and likewise.

And it is quite difficult to tell you about exact marks to score because for JEE-Advance no maximum marks are fixed.

You can check out the latest cut-offs from the link given below :-

https://josaa.nic.in/Result/Result/currentorcr.aspx

Note that the above prediction is made on the basis of latest cut-offs available on official website of JOSAA and the cut-offs are bound to change every year depending upon various factors such as the number of candidates appearing in an examination, the number of candidates qualifying an examination, difficulty level of the paper, and so on.

To have a list of all those colleges which you can get based upon your JEE-Main score, category, and state you can use JEE-Main College Predictor :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

As you are preparing for JEE-Main or JEE-Advance the I would recommend you to check the resources made by our experts to help aspirants like you in the best and smart preparation of JEE-Main or JEE-Advance :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

I hope this information helps you.

Good Luck!!