This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'Length of Posterior vaginal wall is \nSelect and explain. \nA. Variable, B. Same as anterior vagina wall, C. Less than anterior vagina wall, D. More than anterior vagina wall', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The anterior wall of the vagina is about 8 cm long and the posterior wall about 10 cm long. ref - BDC 6e vol2 pg 393', 'role': 'assistant'}]