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
Cortical mastoidectomy is indicated in - 
Select and explain. 
A. Cholesteatoma without complication, B. Coalescent mastoiditis, C. CSOM with brain abscess, D. Perforation in Pars flaccida
B: Coalescent mastoiditis
Answer: B: Coalescent mastoiditis 
Explanation: None