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': 'Casoni test is: \nSelect and explain. \nA. Type I Hypersensitivity reactions, B. Type II Hypersensitivity reactions, C. Type III Hypersensitivity reactions, D. Type IV Hypersensitivity reactions', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Type I Hypersensitivity reactions', 'role': 'assistant'}]