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': 'In pregnancy peak level of HCG occurs at : \nSelect and explain. \nA. Early gestation, B. Mid gestation, C. Late gestation, D. Prelabour', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Early gestation', 'role': 'assistant'}]