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: Surgery
[{'content': 'Ureter is diagnosed during operation by - \nSelect and explain. \nA. Venous plexus, B. High arterial supply, C. Peristaltic movements, D. Circumferance', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]