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
The hepatopancreatic ampulla opens into which of the following pa of duodenum ? 
Select and explain. 
A. first pa, B. second pa, C. third pa, D. fouh pa
B: second pa
Answer: B: second pa 
Explanation: 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