This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': "Most common presentation of DCIS is: - \nSelect and explain. \nA. Breast nodule, B. Nipple discharge, C. Peau'd orange, D. Neck swelling", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Breast nodule(Ref. Bailey 27th Edition 872)* Most common presentation of DCIS is Breast Nodule.* DCIS is diagnosed on Mammography by it's characteristic micro calcifications.* Mammography is the IOC.* Treatment is excision by Simple mastectomy or BCS followed by tamoxifen.", 'role': 'assistant'}]