This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification of carbohydrate, Subject name: Biochemistry
[{'content': 'All of the following are true regarding proteoglycans, EXCEPT:- \nSelect and explain. \nA. Chondroitin sulfate is a glycosaminoglycan, B. They hold less amount of water, C. They are made up of sugar and aminoacids, D. They carry negative charge', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chondroitin sulfate is a glycosaminoglycan -> option 1 is true Proteoglycan = core protein (Amino acid) + Glycosaminoglycan (sugar) -> option 3 is true Sulfate and acetyl groups confer negative charge to the amino acids -> option 4 is true As they are negatively charged, they can hold large amount of water, therefore -> option 2 is wrong.', 'role': 'assistant'}]