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 cervical cancer surgery is limited to patients with \nSelect and explain. \nA. Stage I to IIA, B. Stage I to IIB, C. Stage I to IIIA, D. Stage I to IIIB', 'role': 'user'}, {'content': "Answer: A \nExplanation: Radiation therapy can be used in all stages of disease, but surgery is limited to patients with stage I to IIa disease. The 5-year survival rate for stage I cancer of the cervix is approximately 85% with either radiation therapy or radical hysterectomy. Reference: Novak's gynaecology; 14th edition; Chapter 35; Uterine cancer", 'role': 'assistant'}]