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': 'Sphincter of Oddi consists of \nSelect and explain. \nA. 2 sphincters, B. 3 sphincters, C. 4 sphincters, D. 5 sphincters', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The sphincter of Oddi is a muscular valve that controls the flow of digestive juices through the ampulla of vater into the second pa of the duodenum. It is named after ruggero oddi. Ref - BDC 6e vol2 pg259 , britannica.com', 'role': 'assistant'}]