This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Process of deflouridation of water is 
Select and explain. 
A. Nalgonda technique, B. Soaking, C. Sand filter, D. Parboiling
A: Nalgonda technique
Answer: A: Nalgonda technique 
Explanation: None