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': 'Benefits of Hormone replacement therapy are all except \nSelect and explain. \nA. Prevents osteoporosis, B. Prevents breast cancer, C. Prevents colon cancer, D. Prevent stroke', 'role': 'user'}, {'content': 'Answer: B \nExplanation: HRT is a risk factor for breast cancer.', 'role': 'assistant'}]