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    Question

    Azolla is used as biofertilizer

    in
    A Sugarcane Correct Answer Incorrect Answer
    B Wheat Correct Answer Incorrect Answer
    C Rice Correct Answer Incorrect Answer
    D Cotton Correct Answer Incorrect Answer

    Solution

    Azolla a fern is used for nitogrn fixation in symbiosis with anabaena a blue green algae in rice crop.

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