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': 'Water fluoridation depends upon: \nSelect and explain. \nA. The temperature in that area, B. Body weight, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Water fluoridation depends on the\xa0temperature\xa0in that area and body weight.\nGalagan formula for ﬂuoride:\xa0\nThis is usually calculated by the formula given by Galagan and Vermillion in 1957.\nPpm of F ‾= - 0.038 +0.0062 t temperature in Fahrenheit.\n‘E’ is the estimated daily water intake for children in ounces per pound of body weight.\n‘t’ is the yearly mean of the daily maximum temperature in Fahrenheit.\nEssentials of preventive and community dentistry\xa0\nSoben Peter\xa0\n5th edition', 'role': 'assistant'}]