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
Kayser Fleischer ring is seen in: March 2013 (a, d, e, g) 
Select and explain. 
A. Sympathetic ophthalmitis, B. Hemosiderosis, C. Wilson's disease, D. Keratoconus
C: Wilson's disease
Answer: C: Wilson's disease 
Explanation: Ans. C i.e. Wilson's disease