The correct option is C glycoside
A disaccharide consists of two mono saccharides joined by glycoside bonds.
For example,
(1) Sucrose is a disaccharide containing two monosaccharids glucose and fructose joined by glycoside bonds.
(2) Maltose is a disaccharide containing two monosaccharids glucose and glucose joined by glycoside bonds.
(3) Lactose is a disaccharide containing two monosaccharids glucose and galactose joined by glycoside bonds.