Which of the following is a pair of biofertilizer?

Azolla and BGA

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Nostoc and legume

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Rhizobium and grasses

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Salmonella and E. coli

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Solution

The correct option is B Azolla and BGA
A biofertilizer is a substance, which contains living microorganisms, when applied to seeds, plant surfaces, or soil, colonizes the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. For example, Azolla and blue-green algae (BGA).
So, the correct answer is option A.

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