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: Pathology
[{'content': 'Commonest age group for infant botulism is \nSelect and explain. \nA. 1 to 3 weeks, B. 2 to 4 months, C. 10 to 12 months, D. 7 to 9 Months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]