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
Iatrogenic traumatic facial nerve palsy is MOST commonly produced during which of the following surgical procedure? 
Select and explain. 
A. Myringoplasty, B. Stapedectomy, C. Mastoidectomy, D. Ossiculoplasty
C: Mastoidectomy
Answer: C: Mastoidectomy 
Explanation: Iatrogenic facial nerve trauma most often occurs during mastoidectomy. When injury occur to more than 50% of the neural diameter either primary reanastomosis or reconstruction using a nerve graft is done. Complications of mastoidectomy includes: Infection Labrynthitis ossificans Mucosalization of the middle ear Facial nerve injury CSF leak Encephalocele