This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'schultz dale phenomenon the following is true statements : \nSelect and explain. \nA. anaphylaxis in vitro, B. test to detect atopy, C. type v hypersenstivity reaction, D. test for allergic contact dermatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Schultz-Dale reaction A method for demonstrating anaphylactic hypersensitivity outside the body by suspending an excised intestinal loop or uterine strip from a sensitized animal in an oxygenated, physiological salt solution; addition of the proper allergen causes contraction of the smooth muscle. TYPE I Hypersensitivity * Type I hypersensitivity -- immediate or anaphylactic hypersensitivity * Immediate hypersensitivity is mediated by IgE * The primary cellular component in this hypersensitivity is the mast cell or basophil * The reaction is amplified by neutrophils and eosinophils ref /; anantharayana 9th ed', 'role': 'assistant'}]