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: Gynaecology & Obstetrics
[{'content': 'The percentage of water in Liquor Amnii is: \nSelect and explain. \nA. 42%, B. 64%, C. 76%, D. 99%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 99%', 'role': 'assistant'}]