The four alternatives in each of the question, three alternatives are such that the three words in each are related among themselves in one of the five ways represented by 1),2),3),4) and 5) below while none of these relationships is applicable to the remaining alternative . That is your answer,

Options

A. Atmosphere, Air, Oxygen
B. Boy, Girl, Student
C. Man, Worker, Garden
D. Animal, Dog, Cat

Answer

C