Assertion ( A) : Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre is four. Reason ( R ) : Besides the body centre there is one octahedral void present at the centre of each of the six faced of the unit cell and each of which is shared between the adjacent unit cells.

Assertion ( A) : Total number of octahedral voids present in unit cell

1.	Assertion ( A) : Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre is four. Reason ( R ) : Besides the body centre there is one octahedral void present at the centre of each of the six faced of the unit cell and each of which is shared between the adjacent unit cells.
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 :C