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': 'Which one of the following condition is considered to be definitely precancerous in the larynx - \nSelect and explain. \nA. Vocal nodules, B. Angioma of vocal cords, C. Leukoplakia, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]