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': 'Commonest malignancy type in oral cavity is: September 2010 \nSelect and explain. \nA. Adenocarcinoma, B. Transitional cell carcinoma, C. Squamous cell carcinoma, D. Basal cell carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Squamous cell carcinoma', 'role': 'assistant'}]