The Gutenberg Discontinuity separates:

A. Crust and Mantle A.

B. Mantle and Outer Core B.

C. Outer and Inner Core C.

D. Crust and Lithosphere D.

The Gutenberg Discontinuity separates the Mantle and the Outer Core.

Key Details:

The Gutenberg discontinuity, also known as the core-mantle boundary (CMB), is located at a depth of approximately 2,900 km beneath the Earth's surface.
This boundary is defined by a significant change in the behavior of seismic waves. As waves travel deeper, the Gutenberg discontinuity causes a sharp decrease in the velocity of P-waves and the complete disappearance of S-waves.
The disappearance of S-waves is key evidence that the outer core is liquid, as S-waves cannot pass through liquid material. This tells us that the Gutenberg discontinuity marks the transition from the solid silicate material of the mantle to the molten iron-nickel composition of the outer core.

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