Assertion :Atomicity of Phosphorus is $4$ . Reason: Atomicity is the number of atoms present in $1$ molecule.

Both Assertion and Reason are correct and the Reason is the correct explanation of the Assertion

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Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion

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Assertion is correct but the Reason is incorrect

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Assertion is incorrect but the Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion
Atomicity is the total number of atoms present in one molecule of an element or a substance.
Phosphorus have atomicity of four as it is tetravalent.

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