This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Cardiac biomarker for choice of diagnosis of Reinfraction 8 days after initial ischemia is \nSelect and explain. \nA. Troponins, B. CK-MB, C. Myoglobin, D. LDH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Harrison 19 th ed pg 1594 CK-MB is the cardiac biomarker of choice for diagnosis of Reinfraction 8 days after initial ischemia event', 'role': 'assistant'}]