Select INCORRECT for given reaction sequence.
${\text{P}}_4+{\text{I}}_2+{\text{H}}_2\text{O}\stackrel{ }{\to }\left(\text{X}\right)+\text{HI}+{\text{H}}_3{\text{PO}}_4$

$$\begin{gathered} {\text{P}}_4+{\text{I}}_2+{\text{H}}_2\text{O}\to {\text{PH}}_4\text{I}+\text{HI}+{\text{H}}_3{\text{PO}}_4 \\ {\text{PH}}_4\text{I}+{\text{KOH}}_{\left(a\text{ (a) }\right)}\to {\text{PH}}_{3\left(2\right)}+{\text{KI}}_{\left(4\right))}+{\text{H}}_2\text{O} \\ \downarrow {\text{HgCl}}_2\downarrow {\text{CuSO}}_{449}(1-2\text{ drop }) \\ {\text{Hg}}_3{\text{P}}_2\text{ CuI}\downarrow +{\text{I}}_3^e \\ \text{ (ppt) or } \\ {\text{Cu}}_2{\text{I}}_2\downarrow \\ 3{\text{CuSO}}_4+2{\text{PH}}_3\to {\text{Cu}}_3{\text{P}}_2+3{\text{H}}_2{\text{SO}}_4 \end{gathered}$$