Which of the following statements is false?A. Lower the concentration of `D.O` the more polluted is the water sample.B. The tolerable limit of lead in drinking water is 50 ppmC. Water is considered pure if it has `BOD` less than 5 ppmD. Microbials are not oxidized by oxidizing agents like `K_(2)Cr_(2)O_(7)`

Which of the following statements is false?A. Lower the concentration

1.	Which of the following statements is false?A. Lower the concentration of `D.O` the more polluted is the water sample.B. The tolerable limit of lead in drinking water is 50 ppmC. Water is considered pure if it has `BOD` less than 5 ppmD. Microbials are not oxidized by oxidizing agents like `K_(2)Cr_(2)O_(7)`
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