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
Cardiac biomarker for choice of diagnosis of Reinfraction 8 days after initial ischemia is 
Select and explain. 
A. Troponins, B. CK-MB, C. Myoglobin, D. LDH
B: CK-MB
Answer: B: CK-MB 
Explanation: 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