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
Which of the following cells are most increased in number
in the connective tissue wall of a periodontal pocket? 
Select and explain. 
A. Plasma cells, B. Leukocytes, C. Lymphocytes, D. Erythrocytes
A: Plasma cells
Answer: A: Plasma cells 
Explanation: None