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': 'Amount of amniotic fluid at 12 weeks of pregnancy is: \nSelect and explain. \nA. 50 ml, B. 100 ml, C. 200 ml, D. 400 ml', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 50 ml', 'role': 'assistant'}]