B-coli or E-coli are harmless organism but their presence in water ind – McqOptions

MCQOPTIONS

1.	B-coli or E-coli are harmless organism but their presence in water indicates
A.	Presence of pathogenic bacteria
B.	Absence of pathogenic bacteria
C.	Presence of non-pathogenic bacteria
D.	Absence of non-pathogenic bacteria
Answer» B. Absence of pathogenic bacteria

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