In a crystalline solid, having formula $AB_2O_4$, oxide ions are arranged in cubic close packed lattice while cations A are present in tetrahedral voids and cations B are present in octahedral voids.(i) What percentage of the tetrahedral voids is occupied by A?

Question

$\begin{array}{1 1}(A)\;12\%&(B)\;12.3\%\\(C)\;12.5\%&(D)\;13.5\%\end{array} $