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 earliest symptom of acoustic nerve tumor is - 
Select and explain. 
A. Sensorineural hearing loss, B. Tinnitus, C. Vertigo, D. Otorrhea
A: Sensorineural hearing loss
Answer: A: Sensorineural hearing loss 
Explanation: None