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': 'Most common cause of Pseudomyxoma Peritonei is \nSelect and explain. \nA. Mucinous tumour of appendix, B. Ovarian tumour, C. Colorectal carcinoma, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause of Pseudomyxoma Peritonei is mucinoous tumour of appendix > mucinous tumour of ovary.', 'role': 'assistant'}]