$\alpha - D - (+) -$ glucose and $\beta - D - (+) -$ glucose are:

Glucose on prolonged heating with $HI$ gives:

Match List-$I$ with List-$II$ for the following reaction pattern:
Glucose $\xrightarrow{\text{Reagent}}$ Product $\longrightarrow$ Structural prediction

List-$I$ (Reagents)	List-$II$ (Structural prediction)
$a$. Acetic anhydride	$i$. Glucose has an aldehyde group
$b$. Bromine water	$ii$. Glucose has a straight chain of six carbon atoms
$c$. Hydroiodic acid	$iii$. Glucose has five hydroxyl groups
$d$. Hydrogen cyanide	$iv$. Glucose has a carbonyl group

Choose the correct answer from the options given below.

Which of the following statements is correct?

Which of the following does not show any reducing test of aldehyde?

Which is not a pair of reducing sugars?