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  1. The Palaeozoic era starts at ____ million years ago and ends at ____ million years ago.

    2. A.

     500, 100
    B.

     570, 225
    C.

     470, 150
    D.

     470, 225

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    Answer : Option B

    Explanation :

    The Palaeozoic era starts at 570 million years ago and ends at 225 million years ago.

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