This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
[{'content': 'Which carpal bone appears at 2 months of age? \nSelect and explain. \nA. Capitate, B. Pisiform, C. Lunate, D. Trapezoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref.nelson textbook of pediatrics 20th edition page 68', 'role': 'assistant'}]