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 71/2 months old child with cough, mild stridor is staed on oral antibiotics. The child showed initial improvement but later developed wheeze, productive cough, and mild fever. X-ray shows hyperlucency and PFT shows an obstructive curve. The most probable diagnosis is, \nSelect and explain. \nA. Bronchiolitis obliterans, B. Post viral syndrome, C. Pulmonary alveolar microlithiasis, D. Follicular bronchitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Bronchiolitis obliterans): The patient in question is presenting with charachteristic features of bronchiolitis obliterans. Fever, cough, and wheeze are common clinical features of bronchiolitis obliterans and a period of initial improvement may well be seen in cases of bronchiolitis obliterans (Initial sign of B.0). Hyperluscency or chest X-Ray and obstructive curve on pulmonary function tests fuhur suggest the diagnosis of bronchiolitis obliterans.', 'role': 'assistant'}]