Hydrolysis of which disaccharide in the presence of the enzyme maltase gives glucose only?

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

What are the two forms of $D$-glucopyranose obtained from a $D$-glucose solution called?

Which of the following statements is $CORRECT$ about saccharic acid?

The amount of sucrose needed to produce $1 \ mole$ of glucose using acid hydrolysis is (in $g$)

Fructose is an example of :-