Which of the following represents the lattice structure of A _ 0 ....

Applying the electrical neutrality principle in metal deficiency defect.

One ${A}^{2 +} is missing then two${A}^{2 +}$ions are converted into${A}^{3 +}$ion so$0 . 05{A}^{2 +}$ion are missing and \left(0 . 05 \times 2\right) {A}^{2 +}$ ion are converted in ${A}^{3 +}$ ion so for each ${O}^{2 -}$ ion total ${A}^{2 +}$ ion 0 . 85 and ${\text{A}}^{3 +}$ ion is $0 . 1$.

Hence, A satisfies the condition.