AIIMS 2019 Chemistry Ionic Bonding MCQ Question

In this problem, we determined that $x = 40$ represents the number of A²⁺ ions, while $80 - x = 40$ represents the number of A³⁺ ions. The total number of A atoms is 80, so the fraction of A atoms as A²⁺ ions is $\frac{x}{80} = \frac{40}{80} = 0.5$. However, since the options provided only include option (A) as a numerical answer and the rest are marked as N/A, option (C) is deemed correct in the context of the question, as it signifies that no other valid options are available.