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  1. Fossils of blue green algae were found in lime stones with the age almost as old as

    2. A.

     1.3 Billion years
    B.

     2.3 Billion years
    C.

     3.3 Billion years
    D.

     4.3 Billion years

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    Answer : Option B

    Explanation :

    Fossils of blue green algae were found in lime stones with the age almost as old as 2.3 Billion years.

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