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': 'The complication of extra capsular extraction of lens is: \nSelect and explain. \nA. Cystoid macular oedema, B. Opacification of capsule, C. Iritis, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Cystoid Macular Oedema; B i.e. Opacification of capsule; C i.e. Iritis', 'role': 'assistant'}]