The following question, consist of two words each that have a certain relationship to each other, followed by four lettered pairs of words. Select the lettered pair that has the same relationship as the original pair of words: Horse : Gallop :: Duck : ?

The answer is B. Waddle.

A horse gallops, a duck waddles. Both are ways of moving. A horse gallops by moving its legs

A strut is a way of walking that is proud and confident. A prowl is a way of walking that is slow and stealthy. A trot is a way of walking that is faster than a walk but slower than a run.

Of the four options, only waddle is a way of moving that is similar to gallop.