The zone of discontinuity that separates the Earth's crust from the underlying mantle is known as the:

💡 Solution & Explanation

The Mohorovicic Discontinuity marks the boundary between the Earth's crust and the upper mantle, characterized by a sharp increase in seismic wave velocities. Other options like Gutenberg and Repetti separate different internal layers, such as the core-mantle boundary and upper-lower mantle boundaries respectively. This concept is a fundamental topic in UPSC and State civil services examinations for understanding internal Earth dynamics.