The proper scientific name of cellobiose is
4-β-D-glucopyransoyl-D-glucopyranose
8-β-D-glucopyranosyl-D-glucopyranose
4NH2SO4 - β - D- reductase
4NH2PO4 - - D- reductase
Cellobiose is a disaccharide composed of two glucose molecules joined together by a β-1,4-glycosidic bond. It is formed by the condensation reaction between the hydroxyl group on the first carbon of one glucose molecule and the hydroxyl group on the fourth carbon of another glucose molecule. This specific linkage gives cellobiose its characteristic structure and properties. The proper scientific name of cellobiose reflects the specific arrangement of the glucose molecules and the type of glycosidic bond present.
Hence, the correct answer is option 1