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': 'Ureters are identified during surgery by : \nSelect and explain. \nA. Peristalsis d/t flow of urine, B. Rich aerial plexus, C. Relation to renal vein & aery, D. Relation to lumbar plexus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Peristalsis due to flow of urineUreters are muscular ducts situated retroperitonially & are identified by peristalsisQ', 'role': 'assistant'}]