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
[{'content': 'Function of umbilical vein is: \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Umbilical vein carries oxygenated blood to embryo', 'role': 'assistant'}]