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': 'Green discharge is M. Commonly seen with \nSelect and explain. \nA. Duct papilloma, B. Duct ectasia, C. Retention cyst, D. Fibroadenosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans is \'b\' ie Duct ectasia "A black or green discharge is usually due to duct ectasia and its complications." - Bailey & Love.Duct ectasia is dilatation of lactiferous ducts associated with periductal inflammation, the pathogenesis of which is unknown.', 'role': 'assistant'}]