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A metallic element crystallizes into a l...

A metallic element crystallizes into a lattice contained sequence of layers `ABABAB….` Any packing of sphere leaves out voilds in the lattice.The percentage by volume of this lattice as empty space is

A

`26%`

B

`74%`

C

`50%`

D

`85%`

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The correct Answer is:
A
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