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': 'Postcataract infection can be prevented by: \nSelect and explain. \nA. Preop oral antibiotics, B. Postop oral antibiotics, C. Intraop IV antibiotics, D. Postop topical antibiotics', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Postop topical antibiotics', 'role': 'assistant'}]