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What Frank Whittle invented?

A. Radar

B. Ethyl gasoline

C. Sonar

D. Jet propulsion

Answer: Option D

Solution(By Examveda Team)

Sir Frank Whittle, (born June 1, 1907, Coventry, Warwickshire, England—died August 8, 1996, Columbia, Maryland, U.S.), English aviation engineer and pilot who invented the jet engine.

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