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': 'Glaukomflecken is a feature of: \nSelect and explain. \nA. Acute narrow-angle glaucoma, B. Pseudoexfoliative glaucoma, C. Juvenile glaucoma, D. Phacolytic glaucoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Acute narrow-angle glaucoma', 'role': 'assistant'}]