In the following question, pairs of words are given, out of which the words in all pairs except one, bear a certain common relationship. Choose the pair in which the words are differently related from the rest.

Choose the pair in which the words are differently related from the rest.

A.

Metal : Ore

B.

Butter : Milk

C.

Gasoline : Petroleum

D.

Soil : Earth

Correct answer is D

In all other pairs, first is a product extracted from the second.