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: Gynaecology & Obstetrics
[{'content': 'Which one of the following sites of endometriosis is not treated by medical therapy : \nSelect and explain. \nA. Rectosigmoid, B. Ovarian, C. Episiotomy, D. Pulmonary', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ovarian', 'role': 'assistant'}]