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
[{'content': 'Most radiosensitive tumor of the following is- \nSelect and explain. \nA. Supraglottic Ca, B. Ca glottis, C. Ca nasopharynx, D. Subglottic ca', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]