The $IUPAC$ name of $\begin{matrix}
C{{H}_{2}}-CH=CH-CHO \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
CHO\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$ is
→$\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
Ph-CH-C-H \\
|\,\,\,\,\,\,\,\,\,\, \\
OH\,\,\,\,\,\,\, \\
\end{matrix}\,\xrightarrow[{{H}_{2}}O]{H{{O}^{\Theta }}}\,(B)$ ; $(A)$ and $(B)$ are isomer and isomerization effectively carried out by trace of base $(B)$ . Identify $(B)$
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