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
Early & established stage of gingivitis is differentiated by increase in number of 
Select and explain. 
A. Plasma cells, B. Neutrophil, C. B-cell, D. Macrophages
A: Plasma cells
Answer: A: Plasma cells 
Explanation: None