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': 'Risk factors for uterine fibroid is \nSelect and explain. \nA. Pregnancy, B. African-american woman, C. Breast feeding, D. Adolescence', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Age and race are risk factors for fibroid.\n\nReproductive age group\nAfrican-american women.', 'role': 'assistant'}]