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: Medicine
[{'content': 'A patient comes with sudden respiratory distress, on examination, bilateral basal crepts are present over chest suggestive of pulmonary edema with normal alveoler wedge pressure. The likely cause is \nSelect and explain. \nA. Narcotic overdose, B. Congestive heart failure, C. Myocardial infarction, D. Cardiogenic shock', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]