This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Which of the following is not in posterior relationship to rectum: \nSelect and explain. \nA. Sacral vertebra, B. Superior rectal artery, C. Seminal vesicles, D. Middle rectal artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C Seminal vesiclesRef: BDC, 6th ed. vol. II pg. 408* Rectum is a 12 cm structure which is in conitunation of sigmoid colon and terminates at anal canal.Relationship of rectum AnteriorPosteriorLaterallyMales* Base of bladder* Seminal vesicles* Rectovesical pouch* Ileum* Ductus deferens* Terminal ureter* Prostate gland* S3-S5 vertebrae* Coccyx* Median sacral artery and vein* Middle rectal artery* Superior rectal artery and vein* Sigmoid colon* Ileum* Pelvic plexuses* Coccygeus muscle* Levator ani muscleFemales* Uterus* Vagina* Rectouterine pouch* Ileum* Sigmoid colonSame as for maleSame as for male', 'role': 'assistant'}]