This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'The neck of pancreas is related on its posterior surface to \nSelect and explain. \nA. Gastroduodenal aery, B. Superior mesenteric vein, C. Inferior vena cava, D. Bile duct', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Neck of pancreas is located between the head and the body of the pancreas. It overlies the superior mesenteric vessels which form a groove in its posterior aspect. Ref - BDC 6e vol2 pg 298-300', 'role': 'assistant'}]