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
Cholestatoma is usually present at: 
Select and explain. 
A. Anteroinferior quadrant of tympanic membrane, B. Posteroinferior quadrant of tympanic membrane, C. Attic region, D. Cental part
C: Attic region
Answer: C: Attic region 
Explanation: Atticoantral type or marginal or unsafe otitis media involves posterosuperior part of middle ear cleft (attic, antrum, posterior tympanum and mastoid) and is associated with cholesteatoma.