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: Dental
[{'content': 'Examination of mouth of a patient with HIV/AIDS may commonly reveal \nSelect and explain. \nA. Macroglossia, B. Periodontal diseases, C. Loss of sensation of taste, D. Red tongue', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]