input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is the best for determining the threshold for diagnosis of a positive test?   (A) Analysis of variance   (B) Pearson coefficient   (C) Receiver-operating characteristic curve   (D) Pre-test probability
output: ['(C) Receiver-operating characteristic curve <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Analysis of variance  (B) Pearson coefficient  (C) Receiver-operating characteristic curve  (D) Pre-test probability <> possible answers', '  Which of the following is the best for determining the threshold for diagnosis of a positive test? <> context']