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': 'Commonest site from where pseudomyxoma peritonei arise : \nSelect and explain. \nA. Ovary, B. Appendix, C. Pancreas, D. Stomach', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]