<prompt> The defluoridations process of drinking water developed by the NEERI is popularly known as -Activated sludge processRecarbonation processNalgonda processDouble pot method  <response>: NEERI developed a technique for removing fluoride by chemical deflouridation of water called Nalgonda technique. REF. PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 596 