Which of the following does not contain a hydrophobic structure?

$Glucose$ and $fructose$ are ......................... of each other.

Identify the reagent $R$ used in the following conversion: $\text{Glucose} \xrightarrow{R} n-\text{hexane}$

Which of the following derivatives is useful for the identification of reducing sugars?

Given below are two statements $:$
Statement $I: D-(+)-\text{glucose} + D-(-)-\text{fructose} \xrightarrow{-H_2O} \text{sucrose}$
$\text{sucrose} \xrightarrow{\text{Hydrolysis}} D-(+)-\text{glucose} + D-(-)-\text{fructose}$
Statement $II:$ Invert sugar is formed during sucrose hydrolysis.
In the light of the above statements,choose the correct answer from the options given below $:$

Which of the following structures represents $\alpha-D$-glucose?