This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basic Concepts, Subject name: Pathology
All of the following are not false about cytokines, except: 
Select and explain. 
A. Include interleukins, B. Produced only in sepsis, C. Cytokines are polypeptides, D. Can have paracrine action
B: Produced only in sepsis
Answer: B: Produced only in sepsis 
Explanation: Cytokines Definition Small, water-soluble, signaling proteins & glycoproteins secreted by hematopoietic & non-hematopoietic cells Also called Interleukins, because they mediate communication between leukocytes Functions Mediate specific cellular interactions and functions of leukocytes Site of action May act on: Cells that produce them (autocrine action) or On neighboring cells (paracrine) and rarely At a distance (endocrine)