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': 'Pulse rate in puerperium : \nSelect and explain. \nA. Increases, B. Decreases, C. Normal, D. Variable', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Normal', 'role': 'assistant'}]