This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypersensitivity, Subject name: Pathology
Ram Devi presented with generalized edema sweating and flushing tachycardia and fever after bee sting. This is: 
Select and explain. 
A. T cell mediated cytotoxicity, B. IgE mediated reaction, C. IgG mediated reaction, D. IgA mediated hypersensitivity reaction
B: IgE mediated reaction
Answer: B: IgE mediated reaction 
Explanation: The symptoms of the patient are due to hypersensitivity type I reaction Type I is mediated by IgE and it flairs up within minutes. The symptoms range form rashes to anaphylactic shock with vasodilation hypotension and bronchiolar spasm.