Criteria for drinking water quality recommended by WHO includes -: (A) Colour < 15 TCU, (B) pH 6.5-8.5, (C) Chloride 200-600 mg/1, (D) All
Answer is D. Ans. is 'a' i.e., Colour < 15 TCU; 'b' i.e., pH 6.5-8.5; 'c' i.e., Chloride 200-600 mg/l