- ✓

- B$HO-CH_2-CH=CH_2$ and $O=CH-CH_2-CH_3$
- C

- D$\begin{array}{*{20}{c}}
{C{H_3} - C - C - C{H_3}} \\
{||\,\,\,\,\,\,\,\,||\,} \\
{O\,\,\,\,\,O\,}
\end{array}$ and $\begin{array}{*{20}{c}}
{C{H_3} - C = C - C{H_3}} \\
{\,|\,\,\,\,\,\,\,\,\,\,|\,} \\
{HO\,\,\,\,\,\,OH\,}
\end{array}$

