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: Social & Preventive Medicine
[{'content': 'Vision 2020 includes all of the following, except: \nSelect and explain. \nA. Onchocerciasis, B. Epidemic conjunctivitis, C. Cataract, D. Trachoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Epidemic conjunctivitis', 'role': 'assistant'}]