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: Surgery
[{'content': 'Bleeding from nipple is seen in: September 2011 \nSelect and explain. \nA. Mastitis, B. Breast carcinoma, C. Mammary dysplasia, D. Eczema', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Breast carcinoma A blood-stained discharge may be caused by duct ectasia, a duct papilloma or carcinoma', 'role': 'assistant'}]