A) Branched chain of glucose molecules linked by $\alpha$ 1-6 glycosidic bond at the site of branching
B) Unbranched chain of glucose molecules liked by $\alpha$, 1-4 glycosidic bond
C) Branched chain of glucose molecules linked by $\beta$,1-4 glycosidic bond in straight chain and $\alpha$, 1-6 glycosidic bond at the site of branching
D) Unbranched chain of glucose molecules liked by $\beta$, 1-4 glycosidic bond
Explanation
Cellulose $\left( C_{6}H_{10}O_{5} \right)_{n}$ is the most abundant organic polymer. It is a polysaccharide and consists of long unbranched chains of glucose residues linked by $\beta$, 1-4 glycosidic bonds.