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Which of the following microbes are used...

Which of the following microbes are used in biological treatment of sewage? (a) Autotrophic bacteria (b) Aerobic bacteria (c) Fungi (d)Heterotrophic bacteria

A

only (a)and (b)

B

only (b) and (c)

C

only (b),(c)and (d)

D

only (a) ,(b) and (c)

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