Who invented the helicopter? MCQ with Answer and Explanation

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Who invented the helicopter?

A. Leonardo da Vinci

B. Igor Sikorsky

C. Juan de la Cierva

D. Paul Cornu

Answer: Option B

Solution (By JKSSB Mock Tests)

Igor Sikorsky developed the first practical helicopter.

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Question #1

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Which country had the first modern public library?

A. France

B. UK

C. Germany

D. USA

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Correct Answer: Option B

Explanation:
The UK's Public Libraries Act of 1850 is the benchmark for the modern public library.

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Question #2

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Who was the first to reach the summit of Mount Teide?

A. Modern

B. Ancient Guanches

C. Sir Edmund Scory

D. Expeditions

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Correct Answer: Option C

Explanation:
Early documented ascent.

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Question #3

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Who discovered the first transiting exoplanet?

A. Michel Mayor

B. Guillermo Torres

C. Both

D. David Charbonneau

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Correct Answer: Option C

Explanation:
HD 209458 b was the first transiting exoplanet.

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