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: Pathology
[{'content': 'Allergy to penicillin group of drugs is classified as \nSelect and explain. \nA. Type 1 reaction, B. Type 2 reaction, C. Type 3 reaction, D. Type 4 reaction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]