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': 'A 45 year old patient comes with greenish discharge of the breast. She also complains of tender mass below areolar tissue. Which of the following is true about this condition? \nSelect and explain. \nA. Associated with smoking, B. Associated with alcohol intake, C. Always unilateral, D. Single duct is involved', 'role': 'user'}, {'content': 'Answer: A \nExplanation: This is a case of duct ectasia.\nIt occurs between 40 to 55 years of age.\nUsually\xa0 bilateral and multifocal.\nIt is associated with the smoking.\nTreatment is to stop smoking and hadfields operation.', 'role': 'assistant'}]