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
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? 
Select and explain. 
A. All size of tumors have good results, B. < 5MM DEPTH OF INVASION, C. <2 cms tumor size, D. <4cms tumor size
D: <4cms tumor size
Answer: D: <4cms tumor size 
Explanation: 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%.