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': 'All of the following veins are formed from vitelline vein except \nSelect and explain. \nA. Hepatic vein, B. Superior vena cava, C. Inferior vena cava, D. Superior mesenteric vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Superior Vena Cava', 'role': 'assistant'}]