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
Which of the following is a component of polysaccharide 
Select and explain. 
A. Synovium, B. Glucosamine, C. Glucoronic acid, D. All
B: Glucosamine
Answer: B: Glucosamine 
Explanation: C i.e. Proteoglycan