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
All are causes of Pseudo Pneumo peritoneum except 
Select and explain. 
A. Subdiaphragmatic fat, B. Laproscopy, C. Chilaiditis syndrome, D. Subphrenic abscess
B: Laproscopy
Answer: B: Laproscopy 
Explanation: Laproscopy is a cause of Pneumo peritoneum. Rest are common of Pseudo Pneumo peritoneum.