Which of the Following Statements About Fluoride Is FALSE

Which of the following statements about fluoride is FALSE?

A) Over 98 per cent of body fluoride content is in bone and teeth.
B) Natural food sources of fluoride are seafood and tea.
C) A mottling of tooth enamel is the earliest sign of fluoride deficiency.
D) Fortifying water supply with fluoride to the level of 1 mg/L can help reduce the incidence of childhood dental caries.
E) Absorption of fluoride from drinking water is almost 100 per cent.