Which is the best estimated pressure, represented in units of GPa, of the lower mantle?

A. 110 GPa

B. 220 GPa

C. 305 GPa

D. 360 GPa

Answer : The best pressure is 110 GPa of the lower mantle.

Explanation : We know that the pressure in the lower mantle starts at 24 GPa and reach a 136 GPa at the boundary.

So, the best pressure is 110 GPa because 220 GPa, a 305 GPa and 360 GPa are the higher value of the maximum value 136 GPa of the lower mantle.

(A) 110 GPa

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