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 hepatopancreatic ampulla opens into which of the following pa of duodenum ? \nSelect and explain. \nA. first pa, B. second pa, C. third pa, D. fouh pa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The second pa of duodenum - The major duodenal papilla is an elevation present posteromedially, 8 to 10 cm distal to the pylorus. The hepatopancreatic ampulla opens at the summit of the papilla. image ref -eahslab.com', 'role': 'assistant'}]