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Q.

Spontaneous radioactivity was discovered by:

 A.

Enrico Fermi

 B.

Henri Becquerel

 C.

Marie Curie

 D.

Ernest Rutherford

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Solution:
Option(B) is correct

Henri Becquerel was a physicist, Nobel laureate, and the discoverer of radioactivity, for work in this field he, along with Marie Skłodowska-Curie and Pierre Curie, received the 1903 Nobel Prize in Physics.

The SI unit for radioactivity, the becquerel (Bq), is named after him.


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