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': 'Screening are for trachoma is: \nSelect and explain. \nA. Below 5 years school child only, B. 1-9 years, C. 9-14 years, D. 5-15 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. 1-9 years', 'role': 'assistant'}]