This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': 'Mucopolysaccharide hyaluronic acid is present in - \nSelect and explain. \nA. Vitreous humor, B. Cornea, C. Blood vessels, D. Lens', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The normal youthful vitreous gel is composed of a network of randomly-oriented collagenfibrils interspersed with numerous spheroidalmacromolecules of hyaluronic acid. Ref comprehensive ophthalamology AK Khurana 4th edition page no:243 .', 'role': 'assistant'}]