This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ovarian Tumors and Vulvar cancer, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following are known risk factors for the development of ovarian carcinoma EXCEPT: \nSelect and explain. \nA. Family History of ovarian carcinoma, B. Use of oral contraceptive pills, C. History of infeility, D. BRCA-1 positive individual', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oral contraceptive use reduces the risk of epithelial ovarian cancer. Risk factors for ovarian carcinoma * Age--between 45 and 60 years* Nulliparous or of low parity* Woman with history of infeility, previous PCOS, or on tamoxifen* High-calorie, high-fat diet* Genetic predisposition BRCA-1 and BRCA-2 genes* Late menopause* Breast and gastrointestinal cancer* Prolonged H in menopausal woman', 'role': 'assistant'}]