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
Singer's nodule is due to: 
Select and explain. 
A. Bacteria, B. Viral, C. Fungus, D. Voice abuse
D: Voice abuse
Answer: D: Voice abuse 
Explanation: Ans: d (Voice abuse)Ref: Dhingra E.N.T. 3rd/e p. 365 & 2nd/e p. 299