In 'Azolla', symbiotic relationship exists between–

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(d) Fern and Algae — In 'Azolla', symbiotic relationship exists between fern and algae. Azolla, a fern and the blue- green alga Anabaena azollae maintain a symbiotic relationship: the alga provides nitrogen to the fern, and the fern provides a habitat for the alga. This property of nitrogen fixation has made Azolla extremely economically important in the cultivation of rice. Geography of India

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(A) Fungi and Virus

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(B) Fern and Virus

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(C) Fungi and Algae

In 'Azolla', symbiotic relationship exists between–

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