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: Anaesthesia
[{'content': 'All except one is continued prior to elective caesarean section in an hypertensive diabetic term gestation, obese female who is a case of chronic aorto iliac obstruction. \nSelect and explain. \nA. Labetalol, B. Statins, C. Magnesium sulphate, D. Heparin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Heparin is stopped 6 hours priorly. Rest all drugs need to be continued till day of surgery.', 'role': 'assistant'}]