This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Eosinophils are activated by - 
Select and explain. 
A. IL 1, B. IL 5, C. IL 4, D. IL6
B: IL 5
Answer: B: IL 5 
Explanation: IL 5 activates eosinophils that are recruited to the area. Mediate type 1 hypersensitivity. Basic Pathology, Robbins. Page no.: 111 Interleukin-5 is produced by a number of cell types, and is responsible for the maturation and release of eosinophils in the bone marrow. In humans, interleukin-5 is a very selective cytokine as a result of the restricted expression of the interleukin-5 receptor on eosinophils and basophils Also activates eosinophil