This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is the least likely physiological change in pregnancy : \nSelect and explain. \nA. Increase in intravascular volume, B. Increase in cardiac output, C. Increase in stroke volume, D. Increase In peripheral vascular resistance', 'role': 'user'}, {'content': "Answer: D \nExplanation: The increase in cardiac output does not cause increase in BP. This is due to massive fall in peripheral vascular resistance due to smooth muscle relaxant propeies of progesterone. Reference : Dutta's Textbook of Obstetrics 7th edition page 53", 'role': 'assistant'}]