Which of the following pairs serves as a biofertilizer?

Albugo and Lichen

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Frankia and Nostoc

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Pseudomonas and E.coli

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Spirogyra and Mucor

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Solution

The correct option is C Frankia and Nostoc
Frankia is nitrogen fixing bacteria. It lives in symbiosis with actinorhizal plants. Bacteria of this genus also form root nodules. Blue-green algae belonging to a general cyanobacteria genus, Nostoc or Anabaena or Tolypothrix or Aulosira, fix atmospheric nitrogen and are used as inoculations for paddy crop grown both under upland and lowland conditions. Thus, the correct answer is option B.

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