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

Which of the following molecules represents the $D$-form?

Two statements are given below.
Statement $I$: Milk sugar is a disaccharide of $\alpha-D$-galactose and $\beta-D$-glucose.
Statement $II$: Sucrose is a disaccharide of $\alpha-D$-glucose and $\beta-D$-fructose.
Correct answer is

Which of the following represents the correct structure of $\beta-D-(-)-$Fructofuranose?

An invert sugar is

Identify the sugar containing $\alpha, \beta-1,2-$ glycosidic linkage.