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': 'HIV associated gingivitis is best described by the term? \nSelect and explain. \nA. Juvenile gingivitis, B. Acute necrotising gingivitis, C. Linear gingival erythema, D. Necrotising ulcerative gingivitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]