In face centred cubic unit cell edge length is [DPMT 2005

1.	In face centred cubic unit cell edge length is [DPMT 2005]
A.	\[\frac{4}{\sqrt{3}}r\]
B.	\[\frac{4}{\sqrt{2}}r\]
C.	\[2r\]
D.	\[\frac{\sqrt{3}}{2}r\]
Answer» C. \[2r\]

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In face centred cubic unit cell edge length is [DPMT 2005]

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