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: Pathology
[{'content': 'Mucinous cystadenoma of the ovary arises \nSelect and explain. \nA. From cystic teratoma, B. From surface coelomic epithelium, C. From sex cord stomal cells, D. From ectopic mucin secreting glands', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., From surface coelomic epithelium", 'role': 'assistant'}]