This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Gynaecology & Obstetrics
A 32-year lady with uterine fetal death after normal vaginal delivery continues passing of urine from vagina. What is the most probable diagnosis? 
Select and explain. 
A. Bladder rupture, B. Vesicovaginal fistula, C. Urge incontinence, D. Stress incontinence
B: Vesicovaginal fistula
Answer: B: Vesicovaginal fistula 
Explanation: Most probable diagnosis of above case is Vesicovaginal fistula Causes of Vesicovaginal fistula Obstetric causes Obstructed labor Faulty instrumentation Destructive operations Gynecological causes Hysterectomy Weheim: ureteric dissections Radiation injuries: painful fistula Presentation: Constant dribbling of urine Vulva and thighs are excoriated Splash dysuria UTI Best investigation for VVF: Cystoscopy Other test done in VVF: Three swab test