Which statement is correct about the inner core and mantle of the Earth?

Question

1.The mantle is both solid and liquid,while the inner core in entirely liquid.
2.The mantle is both solid and liquid,while the inner core is entirely solid.
3.The mantle is entirely liquid,while the inner core is entirely solid.
4.The mantle is entirely solid,while the inner core is entirely liquid.

Answer 1

The correct statement is:

2. The mantle is both solid and liquid, while the inner core is entirely solid.

To clarify, the Earth's mantle is mostly solid but behaves plastically and can flow slowly over geological timescales, while the inner core is indeed solid despite the extremely high temperatures that exist at that depth. The outer core, however, is the liquid layer surrounding the solid inner core.