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
Which of the following condition is most commonly associated with cholesteatoma formation? 
Select and explain. 
A. Central perforation, B. Attico-antral perforation, C. Tubo-tympanic disease, D. Otosclerosis
B: Attico-antral perforation
Answer: B: Attico-antral perforation 
Explanation: Atticoantral type of CSOM is most commonly associated with cholesteatoma, granulations or osteitis. It is associated with an attic or marginal perforation. Tubotympanic type of CSOM is associated with central perforation.