This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of External Ear & Pinna, Subject name: ENT
[{'content': 'Which of the following is not a typical feature of malignant Otitis externa: \nSelect and explain. \nA. Caused by Pseudomonas aeruginosa, B. Patients are usually old, C. Mitotic figures are high, D. Patient is immunocompromised', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c) Mitotic figures are high(Ref. Scott Brown, 8th ed., Vol 2; 1420)High mitotic figures are suggestive of a malignant condition. Malignant Otitis externa is not a malignancy but an infective and locally invasive condition.', 'role': 'assistant'}]