This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver & Biliary Tract, Subject name: Pathology
[{'content': '"Kayser - Fleischer rings" seen in \nSelect and explain. \nA. Wilson\'s disease, B. a -1 Antitrypsin deficiency, C. Haemochromatosis, D. Primary biliary cirrhosis', 'role': 'user'}, {'content': "Answer: A \nExplanation: (Wilson's disease) (648 - HM) (656- Basic pathology 8th)* Greenish brown pigmented rings in the periphery of the cornea (Kayer - Fleischer rings) seen in Wilson's disease* In wilson disease, deposition of copper occurs", 'role': 'assistant'}]