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': 'SAFE strategy is for: \nSelect and explain. \nA. Trachoma, B. Diabetic retinopathy, C. Onchocerciasia, D. Glaucoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trachoma', 'role': 'assistant'}]