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
A complex interaction among lymphocytes, inflammatory cells and other cellular elements in connective tissue are mediated by a series of low molecular weight proteins called 
Select and explain. 
A. Bradykinin, B. Histamine, C. Cytokines, D. Kallikrein
C: Cytokines
Answer: C: Cytokines 
Explanation: None