Which polysaccharide has only β-1,4 glycosidic linkages?

Question

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Cellulose is a polysaccharide that has only β-1,4 glycosidic linkages. This means that the glucose monomers that make up cellulose are linked together by a β bond between the carbon 1 of one glucose molecule and the carbon 4 of the adjacent glucose molecule. Glycogen and amylopectin have both α-1,4 and α-1,6 glycosidic linkages, while amylose and starch have α-1,4 glycosidic linkages.

Which Polysaccharide Has Only β-1,4 Glycosidic Linkages