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': 'Usual size of a chocolate cyst of the ovary is about? \nSelect and explain. \nA. 1 inch in diameter, B. 2 inches in diameter, C. 4 inches in diameter, D. 6 inches in diameter', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 2 inches in diameterIt is 3-5 ems.", 'role': 'assistant'}]