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': 'Term gestation patient with critical aortic stenosis presents to the labor, and her cervix  is 6cm dilated. Your approach in treatment of patient includes all except \nSelect and explain. \nA. Provide opiod epidural analgesia., B. Limit activity., C. Do pulmonary artery catheterization., D. Restrict i.v fluids to decrease cardiac preload.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pregnant woman with critical aortic stenosis needs intensive monitoring during labor. So pulmonary artery catheterization is helpful.\nMaintaining intravascular volume and cardiac output is important to decrease chances of hypotension and hemorrhage.', 'role': 'assistant'}]