The first three nearest neighbor distance for primitive cubic lattice are respectively (edge length of unit cell = a):

The first three nearest neighbor distance for primitive cubic lattice

1.	The first three nearest neighbor distance for primitive cubic lattice are respectively (edge length of unit cell = a):
A.	\[a,\,\sqrt{2}a,\sqrt{3}a\]
B.	\[\sqrt{3}a,\,\sqrt{2}a,\,a\]
C.	\[a,\,\sqrt{2}a,2\,a\]
D.	\[a,\,\sqrt{3}a,2\,a\]
Answer» B. \[\sqrt{3}a,\,\sqrt{2}a,\,a\]

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The first three nearest neighbor distance for primitive cubic lattice are respectively (edge length of unit cell = a):

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