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': 'Ureteric constriction is seen at all the following positions, EXCEPT: \nSelect and explain. \nA. Ureteropelvic junction, B. Ureterovesical junction, C. Crossing of iliac aery, D. Ischial spine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Each ureter measures about 10 in. (25 cm) long and resembles the esophagus (also 10 in. long) in having three constrictions along its course. The sites of ureteric constrictions include: where the renal pelvis joins the ureter, where it is kinked as it crosses the pelvic brim, and where it pierces the bladder wall.Ref: Richard S Snell's Clinical Anatomy for Medical Students, 6th Edition, Pages 236, 273", 'role': 'assistant'}]