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