Assertion :- (A) total number of octahedral voids present in unit cell of cubic close of each 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 faces of the unit cell and each of which is shared between two adjeccent units cells.

Options

A. Assertion and reason both are correct statements and Reason is correct explantion for Assertion .
B. Asserton and Reason both are correct statement but Reason is not correct explanation for assertion .
C. Assertion is correct statement but reason is worng statement .
D. Assertion is Wrong statement but Reason is correct statement .

Answer

C

Explanation

Assertion is correct statement but incorrect statement .
Asserrtion :- is true in ccp atom present ar face centre and corner of each unit cell which creates octahedral void at each body centre and all twelve edges of a unit cell as shown

Correct reason is that beside the body centre these is one octahedral void at centre of each of 12 edges which is surrounded by six atoms
out of six atoms four belongs to some unit cell (2 at corner and 2 at face centre ) and 2 atoms belongs to adjacent unit cell .