Nikola Tesla is best known for his contributions to the design of...

Options :
  1. Alternating current and electrical supply system
  2. X ray invention and experimentation
  3. Direct current and electrical supply system
  4. Discovery of earth's magnetic field
Answer and Explanation :-

Answer: Option 1

Explanation:

Nikola Tesla is best known for his contributions to the design of modern alternating current and electrical supply system.

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