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: Surgery
[{'content': 'During urethral catheterization in male patients, resistance is encountered at the following sites except? \nSelect and explain. \nA. Base of navicular fossa, B. Mid-penile urethra, C. Urogenital diaphragm, D. Bulbomembranous junction', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Base of navicular fossa", 'role': 'assistant'}]