<prompt> True regarding fluorosis are all except -Fluorosis is the most common cause of dental caries in childrenFluorosis can cause fluoride deposition in bonesDefluoridation is done by Nalgonda techniqueFluorosis can cause genu valgum  <response>: Dental flourosis is the main cause of mottling of dental enamel.decreased.flourine causes dental cariesREF.PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-595 