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Consider the parts labelled in 1, 2, 3 a...

Consider the parts labelled in 1, 2, 3 and 4 respectively in the following diagram and find out the correct sequences

A

1-COD, 2- BOD,3-Sewage discharge, 4- Direction of flow

B

1-BOD,2-Dissolved oxygen, 3- Sewage discharge, 4- Direction of fow

C

1-Disolved oxygen, 2- BOD, 3- fresh water discharge, 4- Direction of flow

D

1-Disolved oxygen, 2-BOD, 3-Sewage discharge, 4- Direction of flow

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The correct Answer is:
D
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