General Intelligence and Reasoning - Semantic Classification
Classification means to arrange the items of a given group on the basis of common qualities the items possess and then spot the one.
In the question four options are given out of which three are almost same in nature but the remaining one is dissimilar.
Let see some examples:
Question1(SSC CHSL): Which one of the words given below is different from the rest?
Answer: (b) Helicopter
Explanation: Car, Bus and train move on surface and helicopter moves in air.