New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Lichens are indicators

    of 
    A Damp Condition Correct Answer Incorrect Answer
    B Clean air Correct Answer Incorrect Answer
    C Nitrogen and Cause pollution in ponds Correct Answer Incorrect Answer
    D Disease Correct Answer Incorrect Answer

    Solution

    Lichens are an indicator of clean air because they are very sensitive to pollutants, specifically sulfur dioxide.

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