What happens if one question's answer key is wrong in Manipal Entrance Exam

I want to ask a question what happens if one question's answer key is wrong in Manipal Entrance Exam, i have noticed one wrong answer in original paper of 2018 paper.

Can you please send MET 2018 paper? I tried hard but couldn't find it.

You can buy past year papers of arihant company.

I also noticed one integration question 9f 2018 paper by using trapezoidal rule they were asking in which answer was different from simple integration.