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
Oxygenated blood is carried to the fetus by? 
Select and explain. 
A. Umbilical aery, B. Umbilical vein, C. Ductus venosus, D. Hypogastric aery
B: Umbilical vein
Answer: B: Umbilical vein 
Explanation: - 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