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: Physiology
[{'content': 'Ovulation is associated with sudden rise in: \nSelect and explain. \nA. Prolactin, B. Testosterone, C. LH, D. Oxytocin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. LH', 'role': 'assistant'}]