The mapping of which of the following is most difficult ?

A. Mountains

B. Plateaus and Plains

C. Interior of the Earth

D. Oceans and their depth

Answer: Option C

Solution(By Examveda Team)

The Earth's interior is composed of four layers, three solid and one liquid not magma but molten metal, nearly as hot as the surface of the sun. The mapping of interior of the Earth of the following is most difficult.