This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basic Concepts and Vascular changes of Acute Inflammation, Subject name: Pathology
Which of the following is not an inflammatory mediator? 
Select and explain. 
A. Tumor necrosis factor, B. Integrin, C. Interleukin, D. Interferons
B: Integrin
Answer: B: Integrin 
Explanation: Mediators Histamine Serotonin 1deg& 2deg Lysosomal granules Nitric Oxide (NO) Arachidonic Acid metabolites Cytokines & Interleukins Platelet Activation factors TNF