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': 'Length of ureter is: \nSelect and explain. \nA. 15 cm, B. 20 cm, C. 25 cm, D. 30 cm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 25 cm', 'role': 'assistant'}]