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': 'Shoest pa of male urethra is : \nSelect and explain. \nA. Prostatic, B. Membranous, C. Bulbar, D. Penile', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Membranous - Membranous urethra is shoest & Penile urethra is longest pa.Prostatic urethra is widest & most dilatable poion & Urethral orifice f/19 membranous urethra is narrowest & least dilatable pa', 'role': 'assistant'}]