This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Neck holding comes at what age? \nSelect and explain. \nA. 2 months, B. 3 months, C. 4 months, D. 5 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: O.P. Ghai 7th ed, page7 Neck holding comes at 3 months.', 'role': 'assistant'}]