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': 'Hypertranslucency of lung unilaterally is seen on all except – \nSelect and explain. \nA. Pnetunothorax, B. Resection of mammary gland, C. Pulm art. obstruction, D. Pneumonectomy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pneumectomy produces opaque hemithorax (not hypertranslucent).\nPneumothorax, resection of the mammary gland (mastectomy), and pulmonary artery obstruction (Pulmonary embolism) produce unilateral hypertranslucency.', 'role': 'assistant'}]