Choose the correct answer from the alternatives given.Invert sugar is an equimolar mixture of D - glucose and

A: D - galactose- D-galactose is a monosaccharide sugar that serves as an energy source as well as a component of glycosylation. It is a C-4 epimer of glucose that is frequently used as a carbon source in culture media. Galactose is a component of the disaccharide lactose that is released when -galactosidase enzymes hydrolyze it.

B: D - mannose- Mannose is a sugar monomer from the aldohexose carbohydrate series. It is a glucose C-2 epimer. Mannose is essential in human metabolism, particularly in the glycosylation of specific proteins. Mutations in enzymes involved in mannose metabolism are linked to a number of congenital glycosylation disorders.

C: D - fructose- Sucrose, also known as invert sugar, is a disaccharide composed of two monosaccharides, D-glucose and D-fructose. Because the reducing ends of both glucose and fructose participate in bond formation, it is a non-reducing sugar. Invertase is the enzyme responsible for sucrose hydrolysis.

Lactose is formed when glucose and galactose combine.

D: D - ribose- Ribose shows some promise as a treatment for people suffering from energy deficits, such as chronic fatigue syndrome and fibromyalgia, and is popular among athletes looking to boost energy, stamina, and athletic performance.

Hence, the correct answer is C, D-fructose.