Cell edge length in bcc, ccp and simple cubic unit cell is respectively ________
1
\(2 r, \frac{4 r}{\sqrt{3}}, 2 \sqrt{2} r\)
2
\(2 r, 2 \sqrt{2} r, \frac{4 r}{\sqrt{3}}\)
3
\(2 \sqrt{2} r, \frac{4 r}{\sqrt{3}}, 2 r\)
4
\(\frac{4 r}{\sqrt{3}}, 2 \sqrt{2} r, 2 r\)