This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inborn Errors of Metabolism, Subject name: Pediatrics
K-F ring is seen in: 
Select and explain. 
A. Wilson disease, B. Von Gierke disease, C. Phenylketonuria, D. Diabetes
A: Wilson disease
Answer: A: Wilson disease 
Explanation: a. Wilson disease(Ref: Nelson's 20/e p 1939-1940, Ghai 8/e p 320-321)Wilson disease (hepatolenticular degeneration) is an autosomal recessive disorder characterized by degenerative changes in the brain, liver disease, and Kayser-Fleischer rings in the cornea.