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': 'Sitting without suppo occurs at what age ? \nSelect and explain. \nA. 6 months, B. 5 months, C. 10 months, D. 12 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nelson 18th ed, ch8, table 8.1 A child sits alone without suppo at the age of 6-8 months.', 'role': 'assistant'}]