Glucose and Fructose are .......

Consider the following structures. Which of the pairs represent $D$-fructose and $L$-fructose,respectively?

The correct statement$(s)$ about the following sugars $X$ and $Y$ is(are):
$(A)$ $X$ is a reducing sugar and $Y$ is a non-reducing sugar
$(B)$ $X$ is a non-reducing sugar and $Y$ is a reducing sugar
$(C)$ The glycosidic linkages in $X$ and $Y$ are $\alpha$ and $\beta$,respectively
$(D)$ The glycosidic linkages in $X$ and $Y$ are $\beta$ and $\alpha$,respectively

Fructose on reduction gives a mixture of two alcohols which are related as

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

$D$-Glucose exists in $x$ different forms. The value of $x$ (stereoisomer) is