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: Gynaecology & Obstetrics
[{'content': 'Which of the following is the site of bladder injury in abdominal hysterectomy is : \nSelect and explain. \nA. Anterior wall, B. Posterior wall, C. Medial wall, D. Lateral wall', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Posterior wall', 'role': 'assistant'}]