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': "The presence of Kayser-Fleischer ring is pathognomonic of: \nSelect and explain. \nA. Keratoconus, B. Lowe's syndrome, C. Wilson's disease, D. Albinism", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. Wilson's disease", 'role': 'assistant'}]