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
Epley's maneuver - 
Select and explain. 
A. Positional vertigo, B. Otosclerosis, C. ASOM, D. CSOM
A: Positional vertigo
Answer: A: Positional vertigo 
Explanation: None