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: Medicine
Kayser-Fleischer rings (KF rings) are seen in - 
Select and explain. 
A. Pterygium, B. Hematochromatos is, C. Wilson's disease, D. Menke's kinked hair syndrome
C: Wilson's disease
Answer: C: Wilson's disease 
Explanation: None