This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
[{'content': 'Mucopolysaccharide that does not contain Uronic acid residue is: \nSelect and explain. \nA. Heparan Sulphate, B. Heparin, C. Chondroitin Sulphate, D. Keratan Sulphate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Keratan SulphateGAG with no Uronic Acid: Keratan SulphateGAG with no Sulfate group: Hyaluronic AcidGAG not covalently linked to Protein: Hyaluronic Acid', 'role': 'assistant'}]