This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Biochemistry
Mucopolysaccharides in eye are: 
Select and explain. 
A. Keratan sulfate - I and Hyaluronic acid, B. Keratan sulfate - I and Heparan sulfate, C. Chondroitin sulfate and Keratan sulfate - II, D. Chondroitin sulfate and Dermatan sulfate
A: Keratan sulfate - I and Hyaluronic acid
Answer: A: Keratan sulfate - I and Hyaluronic acid 
Explanation: MUCOPOLYSACCHARIDES - heteroglycans made up of repeating units of sugar derivatives, namely amino sugars and uronic acids. These are more commonly known as glycosaminoglycans (GAG).