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': 'Shortest part of the male urethra is - \nSelect and explain. \nA. Prostatic, B. Membranous, C. Bulbar, D. Penile', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Urethra\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Length\no\xa0\xa0 Male- 20 cms\no\xa0\xa0 Female- 4 cms\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Shortest part of the male urethra- Membranous part\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 The longest part of the male urethra- Penile urethra\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Location of sphincter urethrae- Membranous part\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Prostatic urethra\no\xa0\xa0 Widest part\no\xa0\xa0 Most dilatable part\no\xa0\xa0 Concave anteriorly.\no\xa0\xa0 Route- downwards & forwards. Exit prostate slightly anterior to its apex.\no\xa0\xa0 Crescentic on the cross section\no\xa0\xa0 \xa0Structures on the posterior wall\n§\xa0 Urethral crest\n§\xa0 Colliculus seminalis (verumontanum)\n§\xa0 Opening of ejaculatory ducts\n§\xa0 Prostatic sinuses with the opening of prostate glands\no\xa0\xa0 Lymphatics\n§\xa0 Membranous part- Internal iliac nodes\n§\xa0 Prostatic part- Internal iliac nodes\n§ Penile urethra- Deep inguinal nodes.', 'role': 'assistant'}]