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
Casoni test is: 
Select and explain. 
A. Type I Hypersensitivity reactions, B. Type II Hypersensitivity reactions, C. Type III Hypersensitivity reactions, D. Type IV Hypersensitivity reactions
A: Type I Hypersensitivity reactions
Answer: A: Type I Hypersensitivity reactions 
Explanation: Type I Hypersensitivity reactions