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

Answer»

1-COD, 2- BOD,3-Sewage discharge, 4- Direction of flow
1-BOD,2-Dissolved OXYGEN, 3- Sewage discharge, 4- Direction of fow
1-Disolved oxygen, 2- BOD, 3- fresh WATER discharge, 4- Direction of flow
1-Disolved oxygen, 2-BOD, 3-Sewage discharge, 4- Direction of flow

Answer :D


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