The exam board says source material is generally acknowledged on the back of exam papers, but that in this instance a "printing error" resulted in more information being put on the paper than is normal in a music exam.
Alex said his mock papers had not had any such material at the back. He alerted his teacher to the error after the exam.
"It was a silly mistake. They should proof-read the papers beforehand," he said.
"If it is only worth 5% of the paper it's not worth re-taking. We are all in the middle of other exams.
"We should just be marked depending on what we put - but many people would have got the right answer anyway."
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