Given below is the flow chart of sewage ...

Given below is the flow chart of sewage treatement. Identify A,B,C and D and select the correct option.

A

A-Mechanical agitation, B-Increased BOD C-Activated sludge, D-Aerobic sludge digesters

B

A-Mechanical agitation, B-Reduced BOD C-Activated sludge, D-Anaerobic sludge digesters

C

A-Microbial digestion, B-Activated sludge C-Reduced BOD, D-Anaerobic sludge digesters

D

A-Microbial digestion, B-Mechaical agitation C-Reduced BOD, D-Aerobic sludge digesters

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The correct Answer is:

B

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