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: ENT
In a case of glottic carcinoma with fully mobile cords, the treatment of choice is - 
Select and explain. 
A. Total laryngectomy, B. Radiotherapy, C. Hemilaryngectomy, D. Chemotherapy
B: Radiotherapy
Answer: B: Radiotherapy 
Explanation: None