This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
See the fig below. What is your diagnosis? 
Select and explain. 
A. Cataract, B. Wilson's disease, C. Ankylosing spondylitis, D. Behcet syndrome
B: Wilson's disease
Answer: B: Wilson's disease 
Explanation: Ans. B. Wilson's diseaseKayser-Fleischer rings at the junction of the cornea and sclera (arrow) in a patient with Wilson's disease.