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': 'Posterior relations of head of pancres are all except: \nSelect and explain. \nA. Common bile duct, B. First pa of duodenum, C. Aoa, D. Inferior vena cava', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. First pa of duodenumCommon bile duct, inferior venacava lie posterior to head; aoa lies posterior to uncinate process of head; whereas 1St pa of duodenum lie superior & anterior to head of pancreas not posterior', 'role': 'assistant'}]