The question given below consists of a pair of words which have a certain relationship to each other, followed by four pairs of words. Select the pair which has the closest relationship as that of the words given in the question.
Train : Diesel
Punjab Civil Service - 2018,
Answer: D
The pair with the same relationship is Rocket : Propellant.
Diesel is the fuel that a train burns to produce the power that moves it. In the same way, a propellant is the fuel that a rocket burns to drive itself forward. Both pairs are 'vehicle : the fuel that powers it'.
A wheel is a part of a car, not its fuel. Steam is produced by a boiler, the reverse direction of the relation. A pedal is the part of a bicycle through which the rider applies force, a part rather than a fuel. So the other three pairs have different relationships.
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