Starch and cellulose are compounds made up of many ...... units.

The letters $'D'$ or $'L'$ before the name of a stereoisomer of a compound indicate the correlation of configuration of that particular stereoisomer. This refers to their relation with one of the isomers of glyceraldehyde. Predict whether the following compound has $'D'$ or $'L'$ configuration.

Which of the following is $D$-isomer?

Which of the following statements are true about carbohydrates?
$(i)$ Monosaccharides can be hydrolysed.
$(ii)$ The two monosaccharide units obtained on hydrolysis of a disaccharide can either be same or different.
$(iii)$ Polysaccharides are non-sweet in taste.
$(iv)$ All monosaccharides are not 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 $:$

The correct representation in $6-$membered pyranose form for the following sugar $[X]$ is