Which one of the following is a list of devices from least efficient to most efficient
a. Light-Bulb, Automobile Engine, Power Plant, Electric Motor
b. Home oil Furnace, Light Bulb, Electric Motor, automobile
c. Power Plant (thermal), Automobile Engine, Light-bulb (Fluorescent), Light-bulb (Incandescent)
d. Power Plant (thermal), Automobile Engine, Light-bulb (Incandescent), Light-Bulb (Fluorescent)
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