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
Sinus venosus receiver blood from all except 
Select and explain. 
A. Vitelline vein, B. Umbilical vein, C. Common cardinal vein, D. Sub cardinal vein
D: Sub cardinal vein
Answer: D: Sub cardinal vein 
Explanation: Each horn of sinus venosus receives blood from following three pair of veins, vetelline veins (from yolk sac), umbitical veins (from placenta) and common caralinal veins (from body wall).