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: Ophthalmology
[{'content': "Kayser Fleischer ring is seen in: March 2013 (a, d, e, g) \nSelect and explain. \nA. Sympathetic ophthalmitis, B. Hemosiderosis, C. Wilson's disease, D. Keratoconus", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C i.e. Wilson's disease", 'role': 'assistant'}]