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
Compounds with a large amount of carbohydrate & small amount of protein - 
Select and explain. 
A. Glycoprotein, B. Glycosaminoglycan, C. Proteoglycan, D. Glycocalyx
C: Proteoglycan
Answer: C: Proteoglycan 
Explanation: A large amount of carbohydrate small amount of protein → Proteoglycans.
A large amount of protein small amount of carbohydrate → Glycoproteins.