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': 'All of the following conditions are immediate priorities in the WHO\'s "Vision - 2020: The Right to sight" except- \nSelect and explain. \nA. Trachoma, B. Epidemic conjunctivitis, C. Cataract, D. Onchocerciasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: WHO has identified following five diseases for global elimination: -\n\n\nTrachoma blindness and transmission\nCataract blindness\nOnchocerciasis\nAvoidable causes of childhood blindness\nRefractive errors and low vision', 'role': 'assistant'}]