Water samples with BOD values of 4 ppm and 18 ppm, respectively, are – McqOptions

MCQOPTIONS

1.	Water samples with BOD values of 4 ppm and 18 ppm, respectively, are
A.	Clean and clean
B.	Highly polluted and clean
C.	Highly polluted and highly polluted
D.	Clean and highly polluted.
Answer» E.

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