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 features of prostatic Urethra are following except - \nSelect and explain. \nA. Trapezoidal shape on cross-section, B. Presence of mucosal elevation- the verumontanum, C. Opening of Prostatic ducts, D. Urethral Crest on posterior wall', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Urethra\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Length\no\xa0\xa0\xa0Male- 20 cms\no\xa0\xa0\xa0Female- 4 cms\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Shortest part of the male urethra- Membranous part\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0The longest part of the male urethra- Penile urethra\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Location of sphincter urethrae- Membranous part\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Prostatic urethra\no\xa0\xa0\xa0Widest part\no\xa0\xa0\xa0Most dilatable part\no\xa0\xa0\xa0Concave anteriorly.\no\xa0\xa0\xa0Route- downwards & forwards. Exit prostate slightly anterior to its apex.\no\xa0\xa0\xa0Crescentic on the cross section\no\xa0\xa0\xa0\xa0Structures on the posterior wall\n§\xa0\xa0Urethral crest\n§\xa0\xa0Colliculus seminalis (verumontanum)\n§\xa0\xa0Opening of ejaculatory ducts\n§\xa0\xa0Prostatic sinuses with the opening of prostate glands\no\xa0\xa0\xa0Lymphatics\n§\xa0\xa0Membranous part- Internal iliac nodes\n§\xa0\xa0Prostatic part- Internal iliac nodes\n§Penile urethra- Deep inguinal nodes.', 'role': 'assistant'}]