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': 'Ovulation is associated with sudden rise in \nSelect and explain. \nA. Testosterone, B. Prolactin, C. LH, D. FSH', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ovulation is associated with LH surge Ref: guyton and hall textbook of medical physiology 12 edition page number:641,642,643', 'role': 'assistant'}]