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 are the causes of complicated cataract except: \nSelect and explain. \nA. Pars planitis, B. Retinitis pigmentosa, C. Retinal detachment, D. Posterior vitreous detachment', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Posterior vitreous detachment', 'role': 'assistant'}]