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': 'All of the following can cause a white pupillary reflex except: \nSelect and explain. \nA. Retinoblastoma, B. Cataract, C. Retrolental fibroplasias, D. Glaucoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Glaucoma', 'role': 'assistant'}]