This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetal circulation, Subject name: Pediatrics
[{'content': 'Oxygenated blood is carried to the fetus by? \nSelect and explain. \nA. Umbilical aery, B. Umbilical vein, C. Ductus venosus, D. Hypogastric aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - Umbilical vein -> carries oxygenated, nutrient rich blood from placenta to fetus - Umbilical aeries -> carries deoxygenated blood from fetus to placenta for oxygenation - Ductus venosus -> shunt that allows oxygenated blood from umbilical veins directly into inferior vena cava - Hypogastric aery -> aka internal iliac aery -> Supplies pelvic viscera', 'role': 'assistant'}]