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: Gynaecology & Obstetrics
Ureterovaginal fistula should best be treated by: 
Select and explain. 
A. Ureteroneocystostomy, B. End-to-end anastomosis through an ureteric catheter, C. Implantation into colon, D. Heal conduit
A: Ureteroneocystostomy
Answer: A: Ureteroneocystostomy 
Explanation: Surgeries for ureteric fistula:

Bladder flap procedure (modified Boari-Ocker-Blad)
Ureteroneocystostomy
Implantation into the bladder
Note: End to end anastomosis may lead to stricture formation.
Colonic transplantation results in recurrent pyelonephritis and hyperchloremic acidosis.