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who described the three layers of the earth as ‘top-layer’, ‘middle-layer’ and ‘lower-layer’

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Q.

Who described the three layers of the earth as ‘top-layer’, ‘middle-layer’ and ‘lower-layer’ ?

[A] Jeffrey

[B] Holmes

[C] Moho

[D] Dally

Answer & Explanation
Option: [A]

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