Submitted by examrobotsa on Thu, 01/01/1970 - 05:30 What is the correct sequence for treatment of polluted surface water ? 1. Disinfection and fluoridation 2. Screening and mixing 3. Flocculation and sedimentation 4. Filtration and sludge processing Select the correct answer using the code given below :1-2-3-4 3-4-l-22-3-4-13-2-1-4stats: 0,856,1448,368,736,856,344