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
[{'content': 'Malignant otitis externa is - \nSelect and explain. \nA. Malignancy of external ear, B. Caused by hemophilus influenzae, C. Blackish mass of aspergillus, D. Pseudomonas infection in diabetic patient', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]