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: Anatomy
Function of umbilical vein is: 
Select and explain. 
A. Carry oxygenated blood away from the fetus, B. Carry oxygenated blood towards the fetus, C. Carry deoxygenated blood away from the fetus, D. Carry deoxygenated blood towards the fetus
B: Carry oxygenated blood towards the fetus
Answer: B: Carry oxygenated blood towards the fetus 
Explanation: Umbilical vein carries oxygenated blood to embryo