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
[{'content': 'Which Mucopolysaccharide does not contain uronic acid? \nSelect and explain. \nA. Heparin, B. Dermatan sulphate, C. Keratan sulphate, D. Hyaluronic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Keratan sulphate has N-acetyl glucosamine and galactose. It does not contain uronic acid.\nIn general all mucopolysaccharides contain a disaccharide repeat unit having aminosugar and uronic acid', 'role': 'assistant'}]