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: Pediatrics
[{'content': 'A 71/2 year old girl with non productive cough, mild stridor for 3 months duration, patient is improving but suddenly developed wheeze, productive cough, mild fever and on x-ray hyperlucency and PFT shows obstructive curve. The most probable diagnosis is, \nSelect and explain. \nA. Bronchiolitis obliterans, B. Hemosiderosis, C. Pulmonary alveolar microlithiasis, D. Follicular bronchitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bronchiolitis obliterans Repeat from Nov 08 Q no.130', 'role': 'assistant'}]