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': 'A most common complication of extracapsular cataract surgery is – \nSelect and explain. \nA. Retinal detachment, B. Opacification of posterior capsule, C. Vitreous haemorrhage, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: "Opacification of the posterior capsule caused by the proliferation of cells in capsular bag remains the most frequent\xa0complication of ECCE and IOL surgery". _____\xa0Vajpayee', 'role': 'assistant'}]