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 alveolar wedge pressure. The likely cause is \nSelect and explain. \nA. Narcotic overdose, B. Congestive hea failure, C. Myocardial infarction, D. Cardiogenic shock', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Narcotic overdose): Pulmonary edema with normal pulmonary capillary wedge pressure suggests a diagnosis of ARDS or non cardiogenic pulmonary edema. Narcotic overdose is the only non cardiogenic cause for pulmonary edema (ARDS) amongst the options provided and hence the answer here.', 'role': 'assistant'}]