Who was the first person to discover radioactive elements? MCQ with Answer and Explanation

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Who was the first person to discover radioactive elements?

A. Marie and Pierre Curie

B. Wilhelm Röntgen

C. Ernest Rutherford

D. Henri Becquerel

Answer: Option A

Solution (By JKSSB Mock Tests)

The Curies isolated polonium and radium in 1898.

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Question #1

Which country was the first to provide national-level pension benefits?

A. Germany

B. New Zealand

C. United Kingdom

D. United States

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Correct Answer: Option A

Explanation:
Germany's social insurance laws (1889) provided old-age pensions.

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Question #2

Who was the first person to develop a commercial vaccine?

A. Edward Jenner

B. Robert Koch

C. Joseph Lister

D. Louis Pasteur

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Correct Answer: Option A

Explanation:
Edward Jenner created the first smallpox vaccine in 1796.

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Question #3

Who was the first to reach the summit of Mount Everest without supplemental oxygen?

A. Tenzing Norgay

B. Ang Rita

C. Edmund Hillary

D. Reinhold Messner and Peter Habeler

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Correct Answer: Option D

Explanation:
Messner and Habeler in 1978.

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