$\begin{array}{*{20}{c}}
{CH = O} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,C{H_2} - OH}
\end{array}$ $\xrightarrow{{B{r_2}/{H_2}O}}$ $P; P$ is
A $\begin{array}{*{20}{c}}
{COOH} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,C{H_2} - OH}
\end{array}$ B $\begin{array}{*{20}{c}}
{CH = O} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,COOH\,\,\,\,\,\,\,\,}
\end{array}$ C $\begin{array}{*{20}{c}}
{CH = O} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,CH = O\,\,\,\,\,\,\,\,}
\end{array}$ D $\begin{array}{*{20}{c}}
{COOH} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,COOH\,\,\,\,\,\,\,\,}
\end{array}$ Solution
A $\begin{array}{*{20}{c}}
{COOH} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,C{H_2} - OH}
\end{array}$