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': 'Under the WHO"Vision 2020\'program, the"SAFE" strategy is adopted for which of the following diseases: \nSelect and explain. \nA. Trachoma, B. Glaucoma, C. Diabetic retinopathy, D. Onchocerciasis.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Trachoma', 'role': 'assistant'}]