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': 'What is the pH range of amniotic fluid : \nSelect and explain. \nA. 5.5 - 6.0, B. 6.0 - 6.5, C. 6.5 - 7.0, D. 7.0 - 7.5', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 7.0 - 7.5', 'role': 'assistant'}]