This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological diagnosis and operative surgery, Subject name: Gynaecology & Obstetrics
[{'content': 'Chassar moir surgery is done is case of : \nSelect and explain. \nA. Uterine inversion, B. Vesicovaginal fistula repair, C. Ureterovesical fistula repair, D. Retroveed uterus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chassar moir technique is widely used in repair of vesicovaginal fistula. Vagina and bladder are separated all around by flap splitting method and sutured separately in two layers. Reference: Chapter 18; Genital fistula and urinary incontinence; Shaw&;s textbook of gynecology- 16th edition', 'role': 'assistant'}]