This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Anatomy
[{'content': 'All of the following are predisposing factors for breast carcinoma except \nSelect and explain. \nA. Family history of breast carcinoma, B. First child at a younger age, C. Early menarche and late menopause, D. Nulliparous women', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]