Choose the pair in which the words are differently related from the rest.

The answer is C. Clock : Alarm.

In all the other pairs, the first word is an object that is used to create or produce the second word. For example, a fan is used to create wind, a lamp is used to create light, and a bicycle is used to create motion. However, a clock is not used to create an alarm. Instead, an alarm is a device that is used to make a clock ring or sound.

Here is a more detailed explanation of each pair:

• Fan : Blades. A fan is a device that uses rotating blades to create a current of air. The blades are the part of the fan that actually create the wind.
• Lamp : Bulb. A lamp is a device that produces light. The bulb is the part of the lamp that actually produces the light.
• Bicycle : Pedal. A bicycle is a vehicle that is powered by pedals. The pedals are the part of the bicycle that the rider uses to make the bicycle move.
• Clock : Alarm. A clock is a device that measures and displays time. An alarm is a device that is used to make a clock ring or sound at a specific time.

I hope this explanation is helpful!