This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Medicine
[{'content': 'Preferred biochemical marker(s) in patients presenting with myocardial infarction: \nSelect and explain. \nA. Myoglobin, B. Cardiac specific Troponins, C. CK-MB, D. All of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Cardiac specific Troponins (TROP I / TROP II ||) Myoglobin affects skeletal muscle also so we cannot see if it's the case of M.I TROP I: || Within 3 hrs CK-MB: || > 4 hrs", 'role': 'assistant'}]