Explanation:

- Penicillin is linked to Alexander Fleming because he discovered it.

- An AC motor is similarly linked to an inventor or someone significant in its development.

- ?? Option 1: Benjamin Franklin - He is known for his experiments with electricity and inventions like the lightning rod, not for inventing the AC motor.

- ?? Option 2: Isaac Newton - He is renowned for his laws of motion and universal gravitation, unrelated to the invention of the AC motor.

- ?? Option 3: Thomas Edison - Although a famous inventor, he is known for the electric light bulb and DC current.

- ?? Option 4: Nikola Tesla - He is credited with the development of the AC motor and AC electricity system.

Option 4: Nikola Tesla is the correct answer. He played a crucial role in the invention and development of the AC motor, which parallels how Alexander Fleming is related to Penicillin.

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