Amylopectin is a branched chain polymer of α-D glucose units. Here, the linear chains are formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Thus, structure of glycogen is similar to amylopectin. But in reality, they are not same. Amylopectin is the main constituent of starch, main storage polysaccharides in plants, whereas glycogen is the polysaccharides that are stored in plants. Thus, option (ii) is correct.

Option (i) is incorrect because amylose is a long unbranched chain polymer of α-D glucose units in which chain is formed by C1—C4 glycosidic linkage.

Option (iii) is incorrect because cellulose is composed of β-D-Glucose.

Option (iv) is incorrect because glycogen and amylopectin are polymers of α-D-glucose units.