This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carcinoma Ovary, Subject name: Gynaecology & Obstetrics
[{'content': 'M/C ovarian cancer associated with endometriosis: \nSelect and explain. \nA. Endometroid tumor, B. Clear cell tumor, C. Germ cell tumor, D. Brenner tumor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b, i.e. Clear cell tumorM/C ovarian cancer associated with endometrial cancer: Endometrioid tumorM/C ovarian cancer associated with endometriosis: Clear cell carcinoma', 'role': 'assistant'}]