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    Question

    Which of the following is/are a root

    stimulant?
    A Auxin Correct Answer Incorrect Answer
    B Indole-butyric acid Correct Answer Incorrect Answer
    C Naphthylacetic acid Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    All the mentioned chemicals - auxin, indole-butyric acid, and naphthylacetic acid - act as root stimulants.

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