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
True regarding common bile duct is all except - 
Select and explain. 
A. Opens 10 cm distal to the pylorus, B. Lies anterior to I.V.C., C. Portal vein lies posterior to it, D. Usually opens into duodenum separate from the main pancreatic duct
D: Usually opens into duodenum separate from the main pancreatic duct
Answer: D: Usually opens into duodenum separate from the main pancreatic duct 
Explanation: Bile duct opens into 2nd part of duodenum after joining pancreatic duct. It opens into major duodenal papilla, 8-10 cm distal to pylorus.