i’ve never taken an exam like this so i’m not exactly qualified to give my opinion, but it seems pretty unreasonable to disqualify the whole paper for one question that the administration is not even sure has been cheated on. disqualifying that question (or even giving half marks for that question, since the examiner doesn’t seem very sure that the question should be invalidated, but I don’t know if that’s how these types of exams work) would seem much more reasonable. I take the PSAT next year, so I guess i’ll find out then.
Also, like other people have been asking, was this your exam?? If it was, this was absolutely unnecessary.