This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Troponin-T is preferable to CPK-MB in the diagnosis of acute myocardial infraction in all the following situations except \nSelect and explain. \nA. Beside diagnosis of MI, B. Postoperatively - after CABG, C. Reinfraction after 4 days, D. Small infracts', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Harrison 19 th ed pg 1594 Because of cardiac troponins are elevated for prolonged periods an episode of recurrent ischemia after four days would be more readily diagnosed with a marker that remains elevated in blood more briefly such as CK-MB which returns to normal levels by 72 hours .', 'role': 'assistant'}]