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: Medicine
Prophylactic radiotherapy to neck given in which malignancy with palpable swelling - 
Select and explain. 
A. Nasopharyngeal carcinoma, B. Laryngeal carcinoma, C. Sinuses malignancy, D. Tongue carcinoma
A: Nasopharyngeal carcinoma
Answer: A: Nasopharyngeal carcinoma 
Explanation: None