$\begin{matrix}
{{O}_{3}}/Zn \\
(1) \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\begin{matrix}
EtONa/EtOH/\Delta \\
(2) \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\begin{matrix}
NaOCl \\
(3) \\
\end{matrix}\,\,\,\,\,\,\,\,\,\begin{matrix}
{{H}^{+}} \\
(4) \\
\end{matrix}$
- A$1 \to 3 \to 2 \to 4$
- B$1 \to 2 \to 4 \to 3$
- C$1 \to 3 \to 4 \to 2$
- ✓$1 \to 2 \to 3 \to 4$

