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: Radiology
Radiotherapy is the "Treatment" of Choice for: 
Select and explain. 
A. Nasopharyngeal carcinoma T3N I, B. Supraglottic CA T3NO, C. Glottic CA T3NI, D. Subglottic CA T3NO
A: Nasopharyngeal carcinoma T3N I
Answer: A: Nasopharyngeal carcinoma T3N I 
Explanation: Nasopharyngeal carcinoma T3N I