This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: Surgery
[{'content': 'True about tongue cancer: \nSelect and explain. \nA. Most common type is adenocarcinoma, B. Cervical lymph node metastasis is universally present, C. MC site is on Lateral margin, D. Slurring of speech is a common complaint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) MC site is on Lateral marginRef. Bailey & Love 26th ed. 713-14TONGUE CANCER* MC site is middle of lateral border or ventral aspect of the tongue.* MC histological type is squamous cell carcinoma.* MC complaint: Mid-irritation of tongue.* MC associated risk factors are tobacco and alcohol.* MC variety is ulcerative.* ONLY 30% patients present with cervical node metastasis.* The intrinsic tongue musculature provides little restriction to tumour growth, thus it may enlarge considerably before producing symptoms.* Presents as painless mass or ulcer that fails to heal after minor trauma.', 'role': 'assistant'}]