This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'B cells are induced to produce IgE by which of the following \nSelect and explain. \nA. IL-2, B. IL-4, C. IL-1, D. IL-6', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : robbins 10th ed', 'role': 'assistant'}]