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': 'Example of type 1 hypersensitivity \nSelect and explain. \nA. Lepromin test, B. Casoni test, C. Tuberculin test, D. Arthus reaction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]