Which of the following statement(s) is/are correct? (A) \( \mathrm{NaCl} \) is an AB crystal lat...

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Which of the following statement(s) is/are correct?
(A) \( \mathrm{NaCl} \) is an AB crystal lattice that can be interpreted to be made up of two individual fcc unit cells of \( \mathrm{A}^{+} \)and \( \mathrm{B}^{-} \)fused together in such a manner that the corner of one unit cell becomes the edge centre of the other.
(B) In a face-centred cubic unit cell, the body centre is an octahedral void.
(C) In the fcc unit cell, octahedral and tetrahedral voids are equal in number.
(D) Tetrahedral voids \( =2 \times \) octahedral voids, is valid for \( c c p \) and hcp.
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