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Social & Preventive Medicine General bed15e65

All the following statements about purification of water are true except

A

Coliforms must not be detectable in any 100 ml sample of drinking water

B

Presence of clostridial spores indicate recent contamination

C

Sodium thiosulphate is used to neutralize chlorine

D

Coliforms may be detected by multiple tube method and indole production at 44 degrees

High-Yield Explanation

No explanation provided.

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