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: Man : Machine :: Master : ?

The answer is B. Manager.

In the pair "man : machine", the man is the one who controls the machine. In the pair "master : manager", the master is the one who controls the manager.

The other options are not correct because:

• A. Worker is not controlled by a man.
• C. House is not controlled by a man.
• D. Slave is controlled by a master, but the relationship between a master and a slave is different from the relationship between a man and a machine.