This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'With normal cardiac function, a10 mm Hg change in which of the following pressure would have a greatest effect on cardiac output \nSelect and explain. \nA. Pressure in carotid aery, B. Pressure in the pulmonary aery, C. aoic pressure, D. Right atrial pressure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: As change in the aerial BP effects venous return that effects cardiac output Ref: textbook of physiology Volume 1 AK Jain 7th edition', 'role': 'assistant'}]