Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.

Question: Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
[A].

0.5 to 1

[B].

10 to 15

[C].

300 to 500

[D].

1000 to 1500

Answer: Option A

Explanation:

No answer description available for this question.