<prompt> If fluoride concentration of community water is___ppm, no need of any flouride supplement at any stage.1 ppm0.7 ppm2 ppm1.5 ppm  <response>: Supplemental fluoride depends on the age of child and F- level in water.Below 4 years, fluoridated dentifrices are not recommendedBelow 2 years, F- tablets are not recommended.Below 6 years, F- mouthwash is not recommended.If F- concentration of community water is 0.7 ppm, no need of any F- supplement at any age.Essentials of preventive and community dentistry Soben Peter 5th edition 