This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
[{'content': "Singer's nodule is due to: \nSelect and explain. \nA. Bacteria, B. Viral, C. Fungus, D. Voice abuse", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Voice abuse)Ref: Dhingra E.N.T. 3rd/e p. 365 & 2nd/e p. 299', 'role': 'assistant'}]