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
[{'content': 'Watershed area between SMA and IMA which commonly result in ischemia is? \nSelect and explain. \nA. Hepatic flexure, B. Splenic flexure, C. Rectosigmoid Jn., D. Ileocolic In.', 'role': 'user'}, {'content': "Answer: B \nExplanation: There are several weak points in the colonic blood supply, known as watershed areas, which result from incomplete anastomoses of the marginal aeries.The two most common points are:- Griffith's point at the splenic flexure and- Sudeck's point at the rectosigmoid junction.Rectosigmoid junction is the watershed territory between IMA and the internal iliac aery.", 'role': 'assistant'}]