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': 'Which structure lies in the intersigmoid recess - \nSelect and explain. \nA. Left Ureter, B. Left Ureter and left common iliac artery, C. Left Ureter and left common iliac vein, D. Left Ureter, left common iliac artery and left common iliac vein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Left ureter crossing the bifurcation of left common iliac artery lies behind intersigmoid recess, which is a surgical guide for locating left ureter.', 'role': 'assistant'}]