$\begin{array}{1 1} \text{(a) I-1,4-glycosidic linked d-glucose.} \\ \text{(b)sorghum bagasse , corn stalks} \\ \text{(c) Mercerised cotton ,Gun cotton, Cellulose acetate} \\ \text{(d) Glusose , esters , vegetable fibres}\end{array} $