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
Vossius ring occurs in 
Select and explain. 
A. Lens dislocation, B. Concussion injury, C. Penetrating injury, D. Extra capsular extraction
B: Concussion injury
Answer: B: Concussion injury 
Explanation: B i.e. Concussion injury