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': 'Inferior mesenteric aery supplies all of the following except \nSelect and explain. \nA. Rectum, B. Sigmoid colon, C. Splenic flexure, D. Right colic flexure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Inferior mesenteric aery, often abbreted as IMA, supplies the large intestine from the left colic (or splenic) flexure to the upper pa of the rectum, which includes the descending colon, the sigmoid colon, and pa of the rectum.', 'role': 'assistant'}]