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: Physiology
[{'content': 'Central venous pressure is ? \nSelect and explain. \nA. Pressure in IVC, B. Pressure in SVC, C. Pressure in right atrium, D. Pressure in right ventricle', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Pressure in right atrium Central venous pressure (CVP) refers to pressure in right atrium because all the systemic veins open into right atrium. Normal right atrial pressure (CVP) is about 2 mm Hg.", 'role': 'assistant'}]