Explanation:

 The Earth's interior is composed of several layers with distinct boundaries, known as discontinuities. These boundaries separate the Earth's interior into distinct zones characterized by variations in composition, density, and physical properties. Some of the major interior Earth discontinuities include: • The Mohorovicic Discontinuity, often referred to as the "Moho," is one of the most important seismic boundaries within the Earth's interior. It is named after the Croatian seismologist Andrija Mohorovicic, who discovered it in 1909. The Moho represents a significant boundary that separates the Earth's  outermost layer, known as the crust, from the underlying mantle. Hence pair 1 is not correctly matched. o The Moho is typically located at depths that vary depending on the geological setting and location. On average, it is situated around 5 to 10 kilometers (3 to 6 miles) below the Earth's surface beneath oceanic crust and approximately 20 to 70 kilometers (12 to 43 miles) below the Earth's surface beneath continental crust. • The Gutenberg Discontinuity, also known as the "Gutenberg-Weber Discontinuity," is a significant seismic boundary or discontinuity within the Earth's interior. It is named after two German seismologists, Beno Gutenberg and Ernst Mohr Weber. o The Gutenberg Discontinuity marks the boundary between two major portions of the Earth's mantle: the upper mantle and the lower mantle. These portions have distinct physical properties and behave differently in response to seismic waves. Hence pair 2 is not correctly macthed. • The Lehmann Discontinuity, named after the Danish seismologist Inge Lehmann, is a seismic boundary or discontinuity within the Earth's interior. Inge Lehmann discovered this important boundary in 1936. The Lehmann Discontinuity is located deep within the Earth's core and marks a transition zone within this region