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: Water content of lens is 64%. Ref: Parson Ophthalmology 22nd/e p.261&21st/e p.256.', 'role': 'assistant'}]