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  1. Least audible sound for most of the human ear is :

    2. A.

     10.0 µ bar
    B.

     0.0002 µ bar
    C.

     0.005 µ bar
    D.

     5.0 µ bar

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    Answer : Option B

    Explanation :

    Least audible sound for most of the human ear is 0.0002 µ bar.

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