Methanogens are found in
I. organic acid
II. rumen of cattle
III. rumen of cats
IV. anaerobic sludge
Choose the correct option.

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I and II

III and IV

II and III

II and IV

answer is C.

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Detailed Solution

Methanogens, particularly Methanobacterium, are the anaerobic bacteria, which breakdown cellulosic material to produce methane, CO₂ and H₂. These are found in the anaerobic sludge in sewage treatment plants and rumen (a part of stomach) of cattle. These play an important role in nutrition.

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