The SI unit of radioactivity is :

Becquerrel

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Curie

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Rutherford

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None of these

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Solution

The correct option is A Becquerrel
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.

In SI system of units, Becquerrel is the unit of radioactivity.
Curie is also a unit of radioactivity but not in SI system.

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