This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'IL-5 is released in which hypersensitivity reaction: September 2011 \nSelect and explain. \nA. Type I, B. Type II, C. Type III, D. Type IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Type I T-helper2 (Th2) cells release IL4, IL5, GM-CSF and other local factors that lead to an influx of eosinophils and tissue damage in contact dermatitis .', 'role': 'assistant'}]