This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Operative Obs, Subject name: Gynaecology & Obstetrics
[{'content': "Which procedure has the highest incidence of ureteric injury: \nSelect and explain. \nA. Abdominal hysterectomy, B. Vaginal hysterectomy, C. Wertheim's hysterectomy, D. Adnexectomy", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C. Wertheim's hysterectomyThe incidence of ureteral injury has increased during the past four to five decades since removal of the uterine cervix has become a standard procedure with abdominal hysterectomy.Removal of the cervix is the riskiest part of the total abdominal hysterectomy procedure because most injuries occur in the lowest 3cm of ureter just above the bladder.Gynecologic Procedures Associated with Ureteral InjuryOperative ProcedureIncidence of Ureteral Injury (%)Abdominal hysterectomy0.5-1.0Vaginal hysterectomy0.1Extensive Wertheim Hysterectomy1.0-2.0Adnexectomy0.1Marshall-Marchetti-Krantz procedure<0.1", 'role': 'assistant'}]