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A solid is formed and it has three types of atoms X, Y, Z. X forms a FCC lattice with \( \mathrm{Y} \) atoms occupying
\( \mathrm{P} \) all the tetrahedral voids and \( \mathrm{Z} \) atoms occupying half the octrahedral voids. The formula of the solid is :-

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(A) \( \mathrm{X}_{2} \mathrm{Y}_{4} \mathrm{Z} \)
(B) \( \mathrm{XY}_{2} \mathrm{Z}_{4} \)
(C) \( \mathrm{X}_{4} \mathrm{Y}_{2} \mathrm{Z} \)
(D) \( \mathrm{X}_{4} \mathrm{YZ}_{2} \)
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