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: Dental
[{'content': 'In school water fluoridation programme, the level of fluoride as compared to the level in community water fluoridation is: \nSelect and explain. \nA. Less, B. More, C. Same, D. Depends on the mean weight of the children', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The amount of fluoride added to school drinking water must be greater than that used in communal water supplies, i.e., 4.5 times the optimum concentration, since children are in school for shorter hours and less water is consumed during that time.\n\nEssentials of preventive and community dentistry\nSoben Peter\n5th edition\npage number 226', 'role': 'assistant'}]