This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cervical Carcinoma, Subject name: Gynaecology & Obstetrics
[{'content': 'According to Cancer cervix tumor size, which of the following is the Cut-off size of tumor UP TILL which primary surgical treatment is the best option? \nSelect and explain. \nA. All size of tumors have good results, B. < 5MM DEPTH OF INVASION, C. <2 cms tumor size, D. <4cms tumor size', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It is prudent not to operate on lesions that are larger than 4 cm in diameter because these patients will require postoperative radiation therapy. When selected in this manner, the urinary fistula rate is less than 2%, and the operative moality rate is less than 1%.', 'role': 'assistant'}]