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: Unknown
[{'content': 'True about Ackermans tumor Is \nSelect and explain. \nA. It is a highly malignant tumor, B. Verrucous carcinoma of the larynx, C. Radiotherapy is the treatment of choice, D. Spreads via lymphatics in early stage itself', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is a low grade locally aggressive malignancy. Well differentiated squaumous cell carcinoma with very low metastasis rate.\nRadiotherapy is contraindicated as it can produce anaplastic change.', 'role': 'assistant'}]