This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Beta HCG is secreted by \nSelect and explain. \nA. Ovary, B. Pituitary, C. Corpus luteum, D. Placenta', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In molecular biology, human chorionic gonadotropin (hCG) is a hormone produced by the syncytiotrophoblast, a component of the feilized egg, after conception. Following implantation, the syncytiotrophoblast gives rise to the placenta.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-414', 'role': 'assistant'}]