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: Surgery
[{'content': 'Which carcinoma most commonly metastasizes to cervical lymph nodes - \nSelect and explain. \nA. Maxillary sinus, B. Posterior tongue, C. Cheek, D. Hard palate', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Posterior tongue See below Here is the incidence of cervical lymphnode metastasis of various head & Neck tumours Posterior tongue --> 70% (Schwaz 7th/e page 638) Hard palate --> 10-25 % (7thle page 632) Buccal mucosa --> 56% (7th/e page 631) Maxillary Sinus --> Nodal metastases are rare and occur only in 10-15% cases (p 253 E.N.T. Dhingra 3/e)", 'role': 'assistant'}]