1.

Assertion (A) : The packing efficiency is maximum for the fcc structure. Reason ( R ) : The co-ordination number is 12 in fcc structure.

Answer»

Both ASSERTION and REASON are true and reason is the CORRECT EXPLANATION of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false
Both assertion and reason are false.

Answer :b


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