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
The highest frequency of palpable metastasis in neck on presentation is - 
Select and explain. 
A. Carcinoma tongue, B. Buccal mucosa, C. Alveolus, D. Lip
A: Carcinoma tongue
Answer: A: Carcinoma tongue 
Explanation: "Among oral cavity cancers, cancers of the mobile tongue have a high incidence of occult and clinical cervical lymph node metastasis".
─ Head & Neck surgery : otolaryngology