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In which pair most efficient packing is present?

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In which pair most efficient packing is present?
A. hcp and bcc
B. hcp and ccp
C. bcc and ccp
D. bcc and simple cubic cell
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Correct Answer - B
Packing efficiency for hcp and ccp is 74% and that of bcc is 68% and of simple cubic cell is 52.4%
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