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Question

Assertion :Carbon has 2 crystalline forms. Reason: This is due to tetravalency of carbon.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is D Assertion is incorrect but Reason is correct
Carbon has 3 crystalline forms namely graphite, diamond and fullerene. Thus assertion is incorrect. Due to tetravalency of carbon it can exist in above mentioned crystalline allotropes.

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