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: Pathology
As a general rule, veins carry 
Select and explain. 
A. Urine, B. Lymph fluid, C. Oxygenated blood, D. Deoxygenated blood
D: Deoxygenated blood
Answer: D: Deoxygenated blood 
Explanation: All veins carry deoxygenated blood from the body to the heart with the exception of the pulmonary vein
which carries oxygenated blood from the lungs to the heart.