Answer : (D) Cellulose

Step 1 — Recall the three classes of carbohydrate

Monosaccharides — cannot be hydrolysed further

Oligosaccharides — give 2 to 10 monosaccharide units on hydrolysis

Polysaccharides — give a large number of monosaccharide units

Step 2 — Classify each option

Step 3 — Describe cellulose

Cellulose is a straight-chain polymer of $\beta$-D-glucose, the units joined by $\beta$-1,4-glycosidic linkages :

$$(C_6H_{10}O_5)_n + n\,H_2O \rightarrow n\ \beta\text{-D-glucose}$$

It is the chief structural material of plant cell walls, and the most abundant organic substance on Earth.

Step 4 — Note the properties typical of polysaccharides

• Not sweet — hence also called non-sugars
• Generally insoluble in water
• Generally non-reducing, since almost no free anomeric carbon remains

Step 5 — Note a biologically important point

Human digestive enzymes can hydrolyse the $\alpha$-1,4 linkage of starch but not the $\beta$-1,4 linkage of cellulose. This is why we can digest potatoes but not wood or paper — cellulose passes through as dietary fibre.

Other polysaccharides : starch (plant storage) and glycogen (animal storage), both polymers of $\alpha$-D-glucose.