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
The presence of Kayser-Fleischer ring is pathognomonic of: 
Select and explain. 
A. Keratoconus, B. Lowe's syndrome, C. Wilson's disease, D. Albinism
C: Wilson's disease
Answer: C: Wilson's disease 
Explanation: Ans. Wilson's disease