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': 'Mouse Nibbled appearance of vocal cord seen in \nSelect and explain. \nA. TB, B. Syphilis, C. Cancer, D. Papilloma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Earliest sign : Hyperaemia of UC &bposterior commissure area.\nMamillated arytenoids : Swollen arytenoids.\nMouse nibbud appearance : Multiple ulcer on vocal cord.\nTubon epiglottis : Swollen epiglottis of cellular infiitrations (pseudoedima).', 'role': 'assistant'}]