This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary Fistulas, Subject name: Gynaecology & Obstetrics
[{'content': "Kelly's plication operation is done in: \nSelect and explain. \nA. Stress incontinence, B. Vault prolapse, C. Rectal prolapse, D. Uterine prolapse", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is a, i.e. Stress incontinenceRef: Shaw 14th/ed, p174; Textbook of Gynae Sheila Balakrishnan 1st/ed, p330Kelly's plication/Kelley's stitch was the standard first line of treatment for SUI previously but due to low cure rates, it is not being done these days. 5-year failure rate for Kelly's plication is approximately 50%.", 'role': 'assistant'}]