One Horse Power (H.P) is equal to 746 watts; option [C]. This conversion factor is crucial in engineering and physics, especially in determining the power output of engines, motors, and other mechanical devices. It originates from the work of James Watt, who developed the concept of horsepower to compare the power of steam engines to that of draft horses. Over time, it became a standard unit of power measurement globally. Option [C] 746 watts accurately represents this conversion factor, highlighting the significant relationship between horsepower and watts in quantifying mechanical power. This conversion facilitates efficient communication and calculation in various fields, ensuring consistency and accuracy in power measurements across different systems and applications.