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': 'Anatomical feratures of prostatic Urethra are following except? \nSelect and explain. \nA. Trapezoidal shape on cross- section, B. Trapezoidal shape on cross- section, C. Trapezoidal shape on cross- section, D. Urethral Crest on posterior wall', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Trapezoidal shape on cross- section', 'role': 'assistant'}]