Replenishment of dissolved oxygen in water stream polluted with indust – McqOptions

MCQOPTIONS

1.	Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by________________?
A.	Natural aeration of water stream
B.	Photosynthetic action of algae
C.	Both A. & B.
D.	Neither A. nor B.
Answer» D. Neither A. nor B.

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