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
CVP denotes pressure of: September 2005 
Select and explain. 
A. Left ventricle, B. Left atrium, C. Right ventricle, D. Right atrium
D: Right atrium
Answer: D: Right atrium 
Explanation: Ans. D: Right atriumCentral venous pressure denotes pressure in the great veins at their entrance into the right atrium and averages 4.6 mm Hg.Pressure in larger veins outside thorax:5.5 mm Hg Pressure in the venules:12-18 mm Hg