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  1. The crust and the upper-most part of the mantle up to a depth of 200 km from the surface of the earth is called:

  2. A.

     Pyrosphere

    B.

     Osophere

    C.

     Cyrosphere

    D.

     Lithosphere

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    Answer : Option D

    Explanation :

    The mantle extends from Moho's discontinuity (35 km) to a depth of 2,900 km (Moho-Discontinuity to the outer core). The crust and the uppermost part of the mantle are called lithosphere. Its thickness ranges from 10-200 km. The lower mantle extends beyond the asthenosphere.


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