Answers wrongly marked in the response sheet.

As a lot of u know already, a lot of students are facing this issue that the answer we marked in the exam is different to what's shown in the response sheet, I'm thinking of writing a mail to iat regarding this, if u are facing the same problem, I insist in writing a mail to them, as more the number of mails, the more chances of our problem getting noticed, so I really insist everyone to please mail them