This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Hexose sugar is not present in: 
Select and explain. 
A. Ribose, B. Glucose, C. Fructose, D. Galactose
A: Ribose
Answer: A: Ribose 
Explanation: Hexose sugar is present in:Glucose, "blood sugar", the immediate source of energy for cellular respirationGalactose, a sugar in milk (and yogu), andFructose, a sugar found in honeyRibose is a pentose sugar