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
In unsafe CSOM with cholesteatoma and sensorineural deafness treatment of choice is - 
Select and explain. 
A. Simple mastoidectomy, B. Modified radical mastoidectomy, C. Radial mastoidectomy, D. Tympanoplasty
B: Modified radical mastoidectomy
Answer: B: Modified radical mastoidectomy 
Explanation: None