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
In school water fluoridation programme, the level of fluoride as compared to the level in community water fluoridation is: 
Select and explain. 
A. Less, B. More, C. Same, D. Depends on the mean weight of the children
B: More
Answer: B: More 
Explanation: 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.

Essentials of preventive and community dentistry
Soben Peter
5th edition
page number 226