Four words have been given, out of which three are alike in some manner and one is different. Select the odd one.

Correct option is B

Clutch, Brake, and Accelerator are all parts of a vehicle's control system used to manage its movement or speed.
Clutch is used to engage or disengage the engine from the wheels.
Brake is used to slow down or stop the vehicle.
Accelerator is used to increase the speed of the vehicle.
Speed, on the other hand, is a result or measure of motion, not a mechanical part of the vehicle.
Conclusion: The word "Speed" is different because it refers to a concept or measurement, whereas the others are vehicle components.
That the correct answer is (b) Speed.