In the following four words, three are alike in some way and the fourth is different.
A
Garnet
B
Ruby
C
Graphite
D
Emerald
Correct Option:
C
Explanation
Garnet, ruby and emerald are commonly regarded as gemstones. Graphite is an allotrope of carbon used in applications such as pencil "lead" and lubricants, so it breaks the group.
