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
Voissus ring is seen in: 
Select and explain. 
A. Cornea, B. Retina, C. Anterior capsule, D. Posterior capsule
C: Anterior capsule
Answer: C: Anterior capsule 
Explanation: Anterior capsule