The pentose sugar in $DNA$ and $RNA$ has a ......... structure.

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$A$. Glucose $+ HI$	$I$. Gluconic acid
$B$. Glucose $+ Br_{2}$ water	$II$. Glucose pentacetate
$C$. Glucose $+$ acetic anhydride	$III$. Saccharic acid
$D$. Glucose $+ HNO_{3}$	$IV$. Hexane

Choose the correct answer from the options given below.

Two monomers in maltose are

Lactose on hydrolysis gives

In the given three structures,two glucose units are linked. Which of the following correctly identifies the linkages between $C_1$ and $C_4$ and between $C_1$ and $C_6$?

Mutarotation involves -