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Assertion : The number of protons or the...

Assertion : The number of protons or the number of neutrons is known as atomic number. Reason : The mass number is sum of protons and neutrons.

A

Both assertion and reason are true and reason is the correct explanation of assertion.

B

Both assertion and reason are true but reason is not the correct explanation of assertion.

C

Assertion is true but reason is false.

D

Assertion is false but reason is true.

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