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
[{'content': 'Eosinophils are activated by - \nSelect and explain. \nA. IL 1, B. IL 5, C. IL 4, D. IL6', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]