MCQ
Which one of the following is an acyl group :
- A$R-O-$
- B$\begin{array}{*{20}{c}}
{O\,\,\,} \\
{||\,\,\,\,} \\
{R - C - O - }
\end{array}$ - ✓$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,O} \\
{\,\,\,\,\,\,||} \\
{R - C - }
\end{array}$ - D$\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,} \\
{R - C - NH - }
\end{array}$
