This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'A patient with h/o right ear discharge undergoes mastoidectomy but now he presents with vertigo and deafness. Diagnosis is: \nSelect and explain. \nA. Labyrinthitis, B. Thrombophlebitis, C. Temporal lobe abscess, D. Mastoiditis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (a) Labyrinthitis(Ref. Cummings, 6th ed., 2169)Following mastoidectomy deafness along with vertigo is suggestive of labyrinthitis.', 'role': 'assistant'}]