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: Surgery
[{'content': "The water shed area in the marginal aery of Drummond is at \nSelect and explain. \nA. Junction of proximal 2/3rd and distal 1/3' of transverse colon, B. Junction of Ascending and transverse colon, C. Splenic flexure, D. At rectosigmoid junction", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Splenic flexureThe blood supply of colon is derived from the marginal aery of Drummond.It is a paracolic anastomotic aery formed by anastomosis between colic branches of superior mesentric aery ileocolic, right colic, middle colic) and colic branches of inferior muentetic aety (left colic and sigmoidal aeries),', 'role': 'assistant'}]