Faecal contamination of drinking water is indicated by the presence of Faecal contamination of drinking water is indicated by the presence of   mcq  given below:

Q. Faecal contamination of drinking water is indicated by the presence of 

(a) Klebsiella
(b) E. coli
(c) Proteus
(d) Coagulase negative staphylococci

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Ans: (b) E. coli  
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