This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
[{'content': 'The first stimulus in IUL for Leydig cells to produce testosterone : \nSelect and explain. \nA. LH, B. FSH, C. HcG, D. Progesterone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The first stimulus for leydig cells to produce testosterone is HcG The main stimulus for leydig cells to produce testosterone is LH.', 'role': 'assistant'}]