A mineral having the formula \( \mathrm{AB}_{2} \) crystallizes in the cubic close packed lattic...

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A mineral having the formula \( \mathrm{AB}_{2} \) crystallizes in the cubic close packed lattice, with the \( A \) atom occupying the lattice points. The Co-ordination number of \( B \) atoms and the fraction of the tetrahedral sites occupied by \( \mathrm{B} \) atoms are
(A) \( 4,100 \% \)
(B) \( 6,75 \% \)
(C) \( 1,25 \% \)
(D) \( 6,50 \% \)
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