B coli or E coli are harmful organisms but their presence in water indicates the -
(a) presence of pathogenic bacteria
(b) absence of pathogenic bacteria
(c) presence of non pathogenic bacteria
(d) absence of non pathogenic bacteria.
The correct Answer Is
(a) presence of pathogenic bacteria
(a) presence of pathogenic bacteria
(b) absence of pathogenic bacteria
(c) presence of non pathogenic bacteria
(d) absence of non pathogenic bacteria.
The correct Answer Is
(a) presence of pathogenic bacteria
