If three elements \( \mathrm{P}, \mathrm{Q} \) and \( \mathrm{R} \) crystallise in a cubic solid...

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If three elements \( \mathrm{P}, \mathrm{Q} \) and \( \mathrm{R} \) crystallise in a cubic solid lattice with \( \mathrm{P} \) atoms at the corners, \( \mathrm{Q} \) atoms at
\( \mathrm{P} \)
the cube centres and \( \mathrm{R} \) atoms at the centre of the
W
edges, then write the formula of the compound.
(A) \( \mathrm{PQR}_{2} \)
(B) \( \mathrm{PQR}_{3} \)
(C) CQR
(D) \( \mathrm{P}_{3} \mathrm{QR} \)
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