This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'In Dysgerminoma stage 1A, treatment of choice is \nSelect and explain. \nA. TAH with BSO, B. Unilateral ovariotomy with preservation of uterus, C. Bilateral ovariotomy with preservation of uterus, D. Bilateral salpingo-oophorectoy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Surgical management of dysgerminoma Veical midline abdominal incision Peritoneal washings Exploration of abdominal and pelvic organs Unilateral salpingoopherectomy with preservation of uterus Pelvic and paraaoic lymph node sampling Infraacolic omentectomy Removal of the other tumor masses Ref: Shaw Gynecology 17 e pg 469.', 'role': 'assistant'}]