A solid having atoms \( \mathrm{X} \) form \( \mathrm{HCP} \). How ...

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A solid having atoms \( \mathrm{X} \) form \( \mathrm{HCP} \). How many atoms
P are present in a unit cell?

W
(A) 1
(B) 2
(C) 4
(D) 6
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