basaltic rocks. silicate rocks. solid iron and nickel. molten iron and nickel.
I gave my students this multiple choice question: The core of Earth is divided into two layers. The outer core is made of

Only one answer is correct among these 4 choices:
- basaltic rocks.
- silicate rocks.
- solid iron and nickel.
- molten iron and nickel.

Could you tell me which one is correct?

molten iron and nickel.