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: Pathology
Which of these is false regarding cytokines ? 
Select and explain. 
A. Mediators of inflammation, B. Produced by macrophages, C. Are soluble proteins, D. Does not mediate specific reactions
D: Does not mediate specific reactions
Answer: D: Does not mediate specific reactions 
Explanation: Ans. is 'd' i.e., Does not mediate specific reactionsCytokines o Cytokines are soluble proteins (polypeptides)o They are produced by a wide variety of hematopoietic and nonhematopoietic cell types.o They regulate immunological, inflammatory and reparative host responses.o Cytokines mediate their effects by binding to specific high affinity receptors on their target cells. Specific cytokines mediate specific reactions.