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
Unilateral hyperanslucent hemithorax on chest X-ray is seen in: 
Select and explain. 
A. Bronchial asthma, B. Fallot's tetralogy, C. Pulmonary hypeension, D. Poliomyelitis
D: Poliomyelitis
Answer: D: Poliomyelitis 
Explanation: Ans. Poliomyelitis