This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Middle Ear (Otitis Media), Subject name: ENT
Cholesteatoma is seen in: 
Select and explain. 
A. ASOM, B. CSOM, C. Secretory Otitis media, D. Otosclerosis
B: CSOM
Answer: B: CSOM 
Explanation: (b) CSOM(Ref. Cummings, 6th ed., 2141)Cholesteatoma formation is characteristic of unsafe CSOM.The other mentioned options are not associated with cholesteatoma.