This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oxygen dependent bacterial killing, Subject name: Pathology
[{'content': 'Which of the following is the main stimulator of production of eosinophils? \nSelect and explain. \nA. IL-1, B. IL-5, C. IL-4, D. IL-6', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IL-5 is required for the development and maturation of the eosinophil. TH2 cells produce IL-5, which stimulates the production of eosinophils in the marrow and activates eosinophils at sites of immune responses.', 'role': 'assistant'}]