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

• ✓
  $\begin{array}{*{20}{c}}
    {COOH} \\ 
    {\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
    {\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\ 
    {|\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
    {\,\,\,\,\,\,C{H_2} - OH} 
  \end{array}$
• 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
  $\begin{array}{*{20}{c}}
    {COOH} \\ 
    {\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
    {\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\ 
    {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
    {\,\,\,\,\,\,COOH\,\,\,\,\,\,\,\,} 
  \end{array}$