This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT 1, Subject name: Anatomy
[{'content': 'All are relations of left ureter EXCEPT: \nSelect and explain. \nA. Sigmoid mesentery, B. Bifurcation of common iliac aery, C. Quadratus lumborum, D. Gonadal vessels', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Left ureter is related posteriorly to psoas major muscle (not quadratus lumborum). Posterior relations:- Both the ureters run anterior to psoas major muscle and bifurcation of common iliac aery. Anterior relation:- Gonadal vessels cross the ureters anteriorly (medial to lateral) and descend down along with them. Medially the right ureter is related to inferior vena cava and left ureter is related to inferior mesenteric vein.', 'role': 'assistant'}]