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  1. Ozone consists of

    2. A.

     Oxygen only
    B.

     Oxygen and Nitrogen
    C.

     Hydrogen and Carbon
    D.

     Oxygen and Carbon

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    Answer : Option A

    Explanation :

    Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere).

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