In the lesson, Fifth Form of Justice what action did Merle suggest should be taken about their answer papers?

Not to count the answers prophesied by Clive.

Explanation:

When Merle and Mavis finally knew that it was their cousin Clive who had dressed as Merle and sneaked into the study room to get a glimpse of the questions which were to be asked the next day, they informed about it to Miss Mitchell immediately.

Merle suggested that their answers shouldn't be counted because Clive had helped them though they weren't aware of his mischief. Miss Mitchell also agreed not to count the answers which Clive had prophesied. However, both Merle and Mavis managed to pass even after the questions prophesied by Clive were struck down.

i believe that is the truth if thats what you where asking for