Question
$\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
HO-\underset{(3)}{\mathop{C{{H}_{2}}}}\,-\underset{(2)}{\mathop{C{{H}_{2}}}}\,-\underset{(1)}{\mathop{C}}\,-H \\
\end{matrix}$
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
HO-\underset{(3)}{\mathop{C{{H}_{2}}}}\,-\underset{(2)}{\mathop{C{{H}_{2}}}}\,-\underset{(1)}{\mathop{C}}\,-H \\
\end{matrix}$
Which conformer of above compound is most stable (consider conformer across $(C_2 -C_3)$
