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: Radiology
[{'content': "Unilateral hyperanslucent hemithorax on chest X-ray is seen in: \nSelect and explain. \nA. Bronchial asthma, B. Fallot's tetralogy, C. Pulmonary hypeension, D. Poliomyelitis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Poliomyelitis', 'role': 'assistant'}]