This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT 1, Subject name: Anatomy
Ureteric constrictions are at all sites EXCEPT: 
Select and explain. 
A. Pelvi-ureteric junction, B. Lesser pelvis, C. Ischial spine, D. Urinary bladder wall
B: Lesser pelvis
Answer: B: Lesser pelvis 
Explanation: Lesser pelvis is a vague option and does not specify a precise location. Ureter has five constrictions in its course: Pelvi-ureteric junction (tip of transverse process of veebra, radiologically) Pelvic brim (sacro-iliac joint radiologically) At vas deferens At Ureterovesical junction (ischial spine, radiologically) Opening at trigone.