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Select the correct statement from the fo...

Select the correct statement from the following

A

Biogas is produced by the activity of aerobic bacteria on animal waste

B

Methanobacterium is an aerobic bacterium found in rumen of cattle

C

Biogas , commonly called gobar gas, is pure methane

D

Activated sludge - sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria

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The correct Answer is:
D
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