The outer core does not contain silicate.
Answer: Option A
Step-by-step explanation:
The mantle and the crust are made of silicate. Outer core contains nickel and iron. The core is the innermost layer of the earth and contains iron and nickel which are very hot materials because of the hot temperature of the core. The earth when cooled down, moved the high density materials like iron and nickel into the deep surface and low density materials moved to the surface.