input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** ________occurs whenever there is an imbalance between myocardial oxygen supply and demand.   (A) Sudden Death   (B) Stable angina   (C) Unstable angina   (D) Myocardial infarction
output: ['(B) Stable angina <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Sudden Death  (B) Stable angina  (C) Unstable angina  (D) Myocardial infarction <> possible answers', '  ________occurs whenever there is an imbalance between myocardial oxygen supply and demand. <> context']