This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transplantation, Subject name: Surgery
[{'content': 'Left kidney is preferred for transplantation because: \nSelect and explain. \nA. Longer renal vein, B. Higher location, C. Ease of surgery due to anatomical relations, D. To prevent damage to liver', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Longer renal veinRef: Internet SourceThe left kidney is preferred for transplantation because the left renal vein is longer and easy to anastomose.Other advantages mentioned are:* Anatomically easy to remove because liver is on right* Anomalies of vessels are less common on left side.', 'role': 'assistant'}]