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
A case of CSOM presenting with vertigo can have any of the following except - 
Select and explain. 
A. Dural separation, B. Cerebellar abscess, C. Fistula with semicircular canal, D. Any of the above
A: Dural separation
Answer: A: Dural separation 
Explanation: None