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
[{'content': 'Ring of Sommerring is seen in \nSelect and explain. \nA. Galactosemia, B. Dislocation of lens, C. Acute congestive glaucoma, D. After cataract', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. After cataract', 'role': 'assistant'}]