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    Question

    Select the most appropriate option to fill in blank

    number 3
    A by Correct Answer Incorrect Answer
    B in Correct Answer Incorrect Answer
    C for Correct Answer Incorrect Answer
    D of Correct Answer Incorrect Answer

    Solution

    Solution: Water is a compound. So, ‘one of the most essential of compounds’ is correct. the preposition ‘of’ indicates that water is a compound.

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