- ABenzyl alcohol
- ✓$p-$ methoxy benzyl alcohol
- CAllyl alcohol
- DVinyl alcohol
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$(A)$ Nucleotide form from nucleoside and phosphate group by ether linkage
$(B)$ In nucleoside, nitrogenous base link with hexose sugar of $DNA$ or $RNA$
$(C)$ $DNA$ and $RNA$ are differ in only nature of sugar
$(D)$ $A = T$ and $C \equiv G$ are hydrogen bond between nitrogenous base

$(I)$ $\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\
{C{H_3} - C - C{H_2} - C - C{H_3}}
\end{array}$
$(II)$ $\begin{array}{*{20}{c}}
O \\
{||} \\
{C{H_3} - C - C{H_3}}
\end{array}$
$(III)$ $CH \equiv CH$
$(IV)$ $CH_3-CHO$
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