This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
Which of the following is not a reducing sugar? 
Select and explain. 
A. Fructose, B. Galactose, C. Sucrose, D. Maltose
C: Sucrose
Answer: C: Sucrose 
Explanation: Sucrose contains glucose and fructose .sucrose is not a reducing sugar, and it will not form osazone. is because the linkage involves first carbon of glucose and second carbon of fructose, and free reducing groups are not available.Ref: DM Vasudevan, 7th edition, page no: 77