This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Cholesteatoma is seen in? 
Select and explain. 
A. ASOM, B. CSOM, C. Secretory otitis media, D. Osteosclerosis
B: CSOM
Answer: B: CSOM 
Explanation: Cholesteatoma is commonly associated with the attico antral type of CSOM. Attico antral type of CSOM involves posterosuperior pa of the cleft and is associated with an attic or marginal perforation. The disease is often associated with bone eroding processes such as cholesteatoma, granulations and osteitis. Ref: PL Dhingra 7th edition of Ear, Nose and Throat; Pg no 78