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': 'Which of the following is true in case of AIDS patient? \nSelect and explain. \nA. Acute pain, B. Diffuse red lesion of the attached gingiva, C. Gingiva covered with pseudomembrane, D. Gingival itching', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]