A. Mantle
A.
B. Crust
B.
C. Outer core
C.
D. Inner core
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
The crust is the solid, outermost layer of the Earth, comparable to the skin of an apple in thickness. It is the thinnest of all layers and is primarily composed of silicate rocks.