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': '36 year old woman is found tested positive for BRCA 1 mutation. Her mother died due to ovarian cancer. She wishes to lower risk of ovarian cancer. Her general condition is otherwise normal. Which surgery would you recommend \nSelect and explain. \nA. Bilateral oophorectomy, B. Subtotal hysterectomy and bilateral oophorectomy, C. Bilateral salpingo oophorectomy, D. Total hysterectomy and BSO.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Removing both fallopian tubes and ovaries is the best way to reduce the risk of ovarian cancer (90%) and premenopausal breast cancer (50%).', 'role': 'assistant'}]