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 gestational age at which the maternal hCG levels are maximum in a normal pregnancy? \nSelect and explain. \nA. 8 to 10 weeks, B. 12 to 14 weeks, C. 16 to 18 weeks, D. After 20 weeks', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 8 to 10 weeks', 'role': 'assistant'}]