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': 'The frequent mechanism in perforation of appendix is? \nSelect and explain. \nA. Impacted faecolith, B. Tension gangrene due to the accumulating secretions, C. Necrosis of lymphoid patch, D. Retrocaecal function', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Tension gangrene due to the accumulating secretions", 'role': 'assistant'}]