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: Ophthalmology
Which of the following is present in cornea ? 
Select and explain. 
A. Hyaluronic acid, B. Chondroitin sulfate, C. Dermatan sulfate, D. Heparan sulfate
B: Chondroitin sulfate
Answer: B: Chondroitin sulfate 
Explanation: Ans. is 'b' i.e., Chondroitin sulfate