This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Middle Ear (Otitis Media), Subject name: ENT
Treatment of choice for perforation in pars flaccida of the tympanic membrane with cholesteatoma is: 
Select and explain. 
A. Myringoplasty, B. Modified radical mastoidectomy, C. Antibiotics, D. Radical mastoidectomy
B: Modified radical mastoidectomy
Answer: B: Modified radical mastoidectomy 
Explanation: (b) Modified radical mastoidectomy(Ref. Cummings, 6th ed., 2145)Since reconstruction of hearing is not done in radical mastoidectomy, so MRM is preferred over radical mastoidectomy in the treatment of unsafe CSOM to give the patient a hearing ear besides making the ear safe and dry