This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
[{'content': 'Keratan sulphate is found in abundance in \nSelect and explain. \nA. Hea muscle, B. Liver, C. Adrenal coex, D. Cornea', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Keratan sulphate:*Seen in: costal cailages, cornea, nucleus pulposus and wall of aoa*Comp: n*No URONIC ACID*Sulphate is in both gal and glucosamine', 'role': 'assistant'}]