This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
True regarding fluorosis are all except - 
Select and explain. 
A. Fluorosis is the most common cause of dental caries in children, B. Fluorosis can cause fluoride deposition in bones, C. Defluoridation is done by Nalgonda technique, D. Fluorosis can cause genu valgum
A: Fluorosis is the most common cause of dental caries in children
Answer: A: Fluorosis is the most common cause of dental caries in children 
Explanation: Dental flourosis is the main cause of mottling of dental enamel.decreased.flourine causes dental cariesREF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-595)