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
NALGONDA technique' is used in - 
Select and explain. 
A. Enedmic-fluorosis, B. Epidemic-dropsy, C. Endemic-ascites, D. Neurolathyrism
A: Enedmic-fluorosis
Answer: A: Enedmic-fluorosis 
Explanation: The National Environmental Engineering Research Institute Nagpur developed a techniwue for removing flouride by chemical treatment. it is called Nalgonda techniqueREF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-596