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 amniotic fluid is completely replaced in every: \nSelect and explain. \nA. 3 hours, B. 6 hours, C. 9 hours, D. 12 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 3 hours', 'role': 'assistant'}]