Hi Yash !

Yes , ofcourse all the students will get the marks of that question because if NTA has corrected the question , it will obviously issue a new answer key , and then all the candidates will be evaluated according to the new answer key issued by NTA. If only the challenged ones , would get the marks , there would be no transparency and uniformity in the system. So , if a answer is wrong , all the candidates will get marks for that .

Hope it helps!

Be in touch with NTA official website https://ntaneet.nic.in/Ntaneet/Docs/PUBLICNoticeNEETKeychallenge.pdf