Consider the following pairs: Discontinuity : Layers 1. Moho Discontinuity : Separates Crust and mantle 2. Gutenberg Discontinuity : Separates mantle and core 3. Connardo Discontinuity : Separates Felsic and Mefic layer Which of the above given pairs is/are correctly matched? |ForumIAS

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D

Notes:

Explanation:

The portion of the interior beyond the crust is called the mantle. The mantle extends from Moho’s discontinuity to a depth of 2,900 km. The upper portion of the mantle is called asthenosphere.
Connardo’s discontinuity separates upper felsic layer of continent from mefic layer.
It is only present within continental crust and not in the oceanic layer.
While the Gutenberg discontinuity separates the lower mantle from the core. It is present at about 2900 km of depth.

Source: NCERT – XI Fundamentals of Physical Geography