This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nipple Discharge, Subject name: Surgery
[{'content': 'Etiology of bloody discharge from nipple - \nSelect and explain. \nA. Duct papiloma, B. Breast abscess, C. Fibroadenoma, D. Cyst', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Duct papiloma", 'role': 'assistant'}]