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 female urethra \nSelect and explain. \nA. 2cm, B. 4cm, C. 6cm, D. 8cm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The female urethra, about 4 cm in length, is fused with the anterior wall of the vagina. It ends between the clitoris and the vagina. The male urethra, about 20 cm in length, comprises three pas: prostatic, membranous, and spongy Ref - BDC 6e vol2 pg379', 'role': 'assistant'}]