Pick up the correct statement from the following: Options: A . &nbspIn treated sewage, 4 ppm of D.O. is essential B . &nbspOnly very fresh sewage contains some dissolved oxygen C . &nbspThe solubility of oxygen in sewage is 95% that is in distilled water D . &nbspAll the above

Pick up the correct statement from the following:

Question

Pick up the correct statement from the following:

Options:

A . In treated sewage, 4 ppm of D.O. is essential

B . Only very fresh sewage contains some dissolved oxygen

C . The solubility of oxygen in sewage is 95% that is in distilled water

D . All the above

Answer: Option D

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