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
True about left renal vein - 
Select and explain. 
A. Posterior and inferior to Superior mesenteric artery, B. Posterior and superior to superior mesenteric artery, C. Anterior and inferior to Superior mesenteric artery, D. Anterior and superior to Superior mesenteric artery
A: Posterior and inferior to Superior mesenteric artery
Answer: A: Posterior and inferior to Superior mesenteric artery 
Explanation: None