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': 'Which of the following sets of condition is attributed to normal physiology of puerperium : \nSelect and explain. \nA. Tachycardia and weight gain, B. Retention of urine, constipation and weight gain, C. Constipation, tachycardia and retentio of urine, D. Retention of urine and constipation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: General Physiological Changes in Puerperium', 'role': 'assistant'}]