This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small and Large intestine, Subject name: Anatomy
[{'content': 'True regarding common bile duct is all EXCEPT: \nSelect and explain. \nA. Opens 10 cm distal to the pylorus, B. Lies anterior to IVC, C. Poal vein lies posterior to it, D. Usually opens into duodenum separate from the main pancreatic duct', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Common bile duct joins the pancreatic duct to form hepatopancreatic duct which opens into 2nd pa of duodenum( 10 cm distal to the pylorus) at major duodenal papilla. The hepatic duct lies in front and to the right, the hepatic aery to the left, and the poal vein behind and between the duct and aery.', 'role': 'assistant'}]