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': 'Green discharge is M. Commonly seen with ? \nSelect and explain. \nA. Duct papilloma, B. Duct ectasia, C. Retention cyst, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' ie Duct ectasia", 'role': 'assistant'}]