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': 'Tragal sign is elicited in \nSelect and explain. \nA. Otomycosis, B. Furuncle of EAC, C. Malignant otitis externa, D. Diffuse otitis externa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]