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': 'The Prostatic urethra is characterized by all of the following features, except that it: \nSelect and explain. \nA. Is the widest and most dilatable pa, B. Presents a concavity posteriorly, C. Lies closer to anterior surface of prostate, D. Receives Prostatic ductules along its posterior wall', 'role': 'user'}, {'content': "Answer: B \nExplanation: Prostatic urethra is the widest and most dilatable pa of the urethra and is concave anteriorly. Ref: Snell's Clinical Anatomy, 7th Edition, Page 382; Cunningham's Manual of Practical Anatomy, 15th Edition, Volume 2, Page 223", 'role': 'assistant'}]