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    5. Which of the following is not classified as a Bio-fertilizer?

    Question

    Which of the following is not classified as a

    Bio-fertilizer?
    A Anabaena Correct Answer Incorrect Answer
    B Azospirillum Correct Answer Incorrect Answer
    C Rhizobium Correct Answer Incorrect Answer
    D None of the above Correct Answer Incorrect Answer

    Solution

    All options listed, Azospirillum, Rhizobium, and Anabaena, are recognized as bio-fertilizers. They play essential roles in enhancing soil fertility by fixing atmospheric nitrogen and improving plant growth. 

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