This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - II, Subject name: Gynaecology & Obstetrics
[{'content': 'In a sagittal cross section of the pelvis \nSelect and explain. \nA. The urethra lies anterior to the upper third of the vagina, B. The urethra lies posterior to the lower third of the vagina, C. The bladder when empty lies above and anterior to the uterine body, D. The bladder when empty lies parallel and anterior to the uterine body', 'role': 'user'}, {'content': 'Answer: D \nExplanation: - The urethra is only 3.5 cm long and is anterior to the lower third of the vagina. - The bladder when empty lies parallel and anterior to the uterine body', 'role': 'assistant'}]