He pioneered the generation, transmission, and use of alternating current (ac) electricity, which can be transmitted over much greater distances than direct current.

Nikola Tesla was the inventor who invented the Alternate Current (AC). He achieved this in a laboratory in New York City, where he and his partners set up the newly established Tesla Motor Company. The product that will introduce AC to the market was the Alternate Current Induction Motor. This device would be later presented to the American Institute of Electrical Engineers in May 1888 and subsequently patented.

The introduction of the AC Motor disrupted the whole electrical industry and played path to the creation of numerous inventions that would come afterward, particularly in the field of electronics. As such products require to operate under AC.

the answer is a. monarch