This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'Water content In lens is - \nSelect and explain. \nA. 64%, B. 35%, C. 1%, D. 28%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The lens is composed of 64% water, 35% protein, and 1% lipid, carbohydrate and trace elements.', 'role': 'assistant'}]