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  1. Which one of the following statement is correct ?
    Ozone is found in the earth's atmosphere mostly between

    2. A.

     5 and 10 km
    B.

     10 and 20 km
    C.

     20 and 50 km
    D.

     50 and 100 km

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    Answer : Option C

    Explanation :

    Ozone is found in the earth's atmosphere mostly between 20 and 50 km.

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