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: Surgery
[{'content': 'All are causes of Pseudo Pneumo peritoneum except \nSelect and explain. \nA. Subdiaphragmatic fat, B. Laproscopy, C. Chilaiditis syndrome, D. Subphrenic abscess', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Laproscopy is a cause of Pneumo peritoneum. Rest are common of Pseudo\xa0Pneumo peritoneum.', 'role': 'assistant'}]