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
[{'content': 'The cardiac marker that is elevated the earliest in a case of Myocardial Infarction, among the following is - \nSelect and explain. \nA. CPK-MB, B. LDH, C. Myoglobin, D. Troponin I', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans- C Myoglobin', 'role': 'assistant'}]