This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
All are chemokines except - 
Select and explain. 
A. IL-8, B. IL-1, C. Histamine, D. Eotaxin
C: Histamine
Answer: C: Histamine 
Explanation: Histamines are most impoant vasoactive amines , formed by decarboxylation of histidine found in granules of mast cells, basophils & in platelets. Reff: Ananthanarayan & Panikers textbook of microbiology 9th edition pg: 164