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: Unknown
The cardiac marker that is elevated the earliest in a case of Myocardial Infarction, among the following is - 
Select and explain. 
A. CPK-MB, B. LDH, C. Myoglobin, D. Troponin I
C: Myoglobin
Answer: C: Myoglobin 
Explanation: Ans- C Myoglobin