The first computer mouse was invented by: MCQ with Answer and Explanation

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The first computer mouse was invented by:

A. Charles Babbage

B. Alan Turing

C. Douglas Engelbart

D. John von Neumann

Answer: Option C

Solution (By JKSSB Mock Tests)

Douglas Engelbart invented the computer mouse in the 1960s.

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Question #1

Which planet is the second from the sun?

A. Venus

B. Earth

C. Mercury

D. Mars

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Correct Answer: Option A

Explanation:
The order of planets is Mercury, Venus, Earth, Mars, etc.

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Question #2

What is the speed of sound in air at room temperature approximately?

A. 330 m/s

B. 300,000,000 m/s

C. 1500 m/s

D. 450 m/s

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Correct Answer: Option A

Explanation:
The speed of sound in air is approximately 330-343 meters per second at 20°C.

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Question #3

Which mission studies the Sun from Lagrange Point 1?

A. Mangalyaan

B. Chandrayaan-3

C. Aditya-L1

D. INSAT

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Correct Answer: Option C

Explanation:
Aditya-L1 provides continuous solar observations.

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