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Question

In paddy fields, biological nitrogen fixation is chiefly brought about by.

A
Cyanobacteria
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B
Green algae
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C
Mycorrhiza
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D
Rhizobium
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Solution

The correct option is A Cyanobacteria
In paddy fields,biological nitrogen fixation is brought about by Cyanobacteria(Nostoc, Anabaena).
Correct answer-A

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