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  1. The innermost layer is the core with a radius of about ________ km.

    2. A.

     500
    B.

     6500
    C.

     9500
    D.

     3500

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    Answer : Option D

    Explanation :

    The core has, in total, a radius of 3500 km, but it is generally viewed as two distinct parts: the solid inner core, with a radius of 1220 km. the viscous outer core, with a radius of 2300 km.

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