$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HOCH} \\
| \\
{HCOH} \\
| \\
{C{H_2}OH} \\
I
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{HOCH} \\
| \\
{C{H_2}OH} \\
{II}
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{C{H_2}OH} \\
{III}
\end{array}$
$A$. Tollen's reagent $B$. Schiff's reagent $C$. $\mathrm{HCN}$ $D$. $\mathrm{NH}_2 \mathrm{OH}$ $E$. $\mathrm{NaHSO}_3$
નીચે આપેલા માંથી સાચો વિકલ્પ શોધો.