The discovery of X-rays was made by: MCQ with Answer and Explanation

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The discovery of X-rays was made by:

A. Wilhelm Roentgen

B. Marie Curie

C. James Chadwick

D. Enrico Fermi

Answer: Option A

Solution (By JKSSB Mock Tests)

Roentgen discovered X-rays in 1895.

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What is 'Fiber Optics' used for?

A. Faster communication via light

B. Storing physical data

C. Powering cars

D. Cooking food

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Correct Answer: Option A

Explanation:
Fiber optics use thin strands of glass to transmit data as pulses of light.

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The term 'Cybersecurity' primarily deals with:

A. Space missions

B. Agricultural technology

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Correct Answer: Option C

Explanation:
It protects against digital threats.

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Which company launched the first reusable orbital rocket?

A. Boeing

B. SpaceX

C. Blue Origin

D. ISRO

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Correct Answer: Option B

Explanation:
SpaceX's Falcon 9 pioneered reusable rocket technology.

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