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': 'Which structure is related to lateral wall of vagina and uterus: \nSelect and explain. \nA. Inferior vesical altery, B. Ureter, C. Middle rectal aery, D. Urethra', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ureter', 'role': 'assistant'}]