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
[{'content': 'Commonest site of obstetric injury leading to uretero vaginal fistula : \nSelect and explain. \nA. Infundibulo pelvic ligament, B. Vaginal vault, C. Distal to uterine aery near vaginal vault, D. Below cardinal ligament where uterine aery crosses', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Infundibulo pelvic ligament', 'role': 'assistant'}]