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
Not responsible for chronic gingival inflammation? 
Select and explain. 
A. Neutrophil, B. Macrophages, C. T-lymphocytes, D. Plasma cells
A: Neutrophil
Answer: A: Neutrophil 
Explanation: None