What is the monomer unit of glycogen?

Correct option is B

Glucose is the monomer unit of glycogen.
The monomer unit of glycogen is alpha-D-glucose. Alpha-D-glucose can form 1-4 alpha glycosidic bonds, which lead to straight chains, and 1-6 alpha glycosidic bonds, which result in branching. About 1 in ten glycosidic bonds in glycogen are of the 1-6 variety, making it a highly branched polymer.
Glycogen is a polysaccharide and the primary storage form of glucose in animals, including humans. It is synthesized and stored mainly in the liver and muscles and serves as a readily accessible energy source.
Fructose: A key component of sucrose (table sugar) and high-fructose corn syrup, fructose is commonly found in fruits, honey, and root vegetables.
Galactose: Usually found in dairy products as part of lactose (milk sugar), where it is bound to glucose.
Mannose: Less common in foods but plays a role in human metabolism and is used in certain medical applications for its anti-inflammatory properties.