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': 'Anaphylaxis refers to the: \nSelect and explain. \nA. Severe reaction following the injection of protein solutions in a sensitised individual, B. Severe reaction following primary injection of protein solutions, C. State of immunity developed by repeated injections of any foreign substance, D. Severe reaction resulting from sensitivity to common allergens', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prince of Monaco first observed the deleterious effects of jellyfish on bathers.\xa0\nSubsequently, Portier and Richet (1906) suggested a toxin to be responsible for these effects and coined the term “anaphylaxis”.\n\nInitiator cells in anaphylaxis\nThe initiator of type I reaction is otherwise known as allergen.\nTypical allergens include:\n\nPlant pollen\nProteins (e.g., foreign serum and vaccines)\nCertain food items (e.g., eggs, milk, seafood, and nuts)\nDrugs (e.g., penicillin and local anesthetics)\nInsect products (venom from bees, wasps, and ants)\nDust mites and mould spores\nAnimal hair\xa0\nDander\n\nParija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page:149-150', 'role': 'assistant'}]