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
The cause for contact ulcer in vocal cords is: 
Select and explain. 
A. Voice abuse, B. Smoking, C. TB, D. Malignancy
A: Voice abuse
Answer: A: Voice abuse 
Explanation: Aetiology of contact ulcers is mutli factorial but the most impoant cause is: Voice abuse (faulty production of voice rather than excess use).