<prompt> The commonest site of surgical uretero-vaginal fistula is:Below infudibulopelvic ligamentBelow uterine aery in the mackenrodts ligamentVaginal angleAbove uterine aery  <response>: B. i.e. Below uterine aery in Mackenrodts ligament Maximum chances of ureteric injury is in hysterectomy while ligating uterine vessels in mackenrodts ligament Ureter is also vulnerable to injury when ovarian vessels are being ligated during ovariectomy. 