Solve this multiple-choice question and choose the correct option.

History of technology: Who is credited with inventing (developing) the practical four-stroke internal combustion engine? Choose the correct inventor.

Difficulty: Easy

Nikolaus Otto
Étienne Lenoir
Rudolf Diesel
Gottlieb Daimler

Correct Answer: Nikolaus Otto

Explanation:

Given data

Identify the inventor associated with the practical 4-stroke internal combustion (Otto-cycle) engine.

Concept / ApproachAlthough Lenoir built an earlier gas engine (two-stroke-like), Nikolaus Otto (1876) is credited with the practical four-stroke engine. Diesel later invented the compression-ignition (diesel) engine.

Final AnswerNikolaus Otto.

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