This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Troponin-T is preferable to CPK-MB in the diagnosis of acute myocardial infarction (MI) in all of the following situations, EXCEPT: \nSelect and explain. \nA. Bedside diagnosis of MI, B. Postoperatively (after CABG), C. Reinfarction after 4 days, D. Small infarcts', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Levels of Troponin-I (TnI ) and Troponin-T (TnT) may remain elevated for 7-10 days after STEMI. So it is not useful fohe diagnosis of reinfarction after 4 days. In all the other mentioned conditions Troponin-T is preferable to CPK-MB. CPK-MB rises within 4-8 h and generally returns to normal by 48-72 h. Ref: Harrisons principles of internal medicine, 18th edition, Page: 2024.', 'role': 'assistant'}]