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': 'Wheal and flare reaction is: September 2005 \nSelect and explain. \nA. Type I hypersensitivity, B. Type II hypersensitivity, C. Type III hypersensitivity, D. Type IV hypersensitivity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Type I hypersensitivity', 'role': 'assistant'}]