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  1. The second zone of the interior of the earth extending from 30 kilometer to 2900 kilometer depth is:

    2. A.

     Earth Crust
    B.

     Mantle.
    C.

     Outer Core
    D.

     Inner Core

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    Answer : Option B

    Explanation :

    The upper mantle begins at a depth of from 5 to 50 kilometers (3−30 miles) and extends to a depth of approximately 670 kilometers (400 miles) from the surface; the lower mantle extends from a depth of about 670 kilometers (400 miles) to about 2,900 kilometers (1,740 miles).

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