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: Pharmacology
[{'content': 'The incidence of allergy to penicillin among various population ranges from \nSelect and explain. \nA. 1% to 10%, B. 10% to 20%, C. 20% to 30%, D. 30% to 40%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]