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': 'Nipple retraction in Ca breast due to infiltration of \nSelect and explain. \nA. Suspensory ligaments, B. Lactiferous ducts, C. Lymphatics, D. Pectoralis fascia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Lactiferous ductsIt is seen in breast carcinoma due to infltration of the lactiferous ducts by carcinoma.It is due to extention of the growth along the lactiferous ducts and subsequent fibrosis.Nipple retraction is circumferential in carcinoma and slit like in periductal mastitis.', 'role': 'assistant'}]