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': 'A child is able to copy a cross at what age? \nSelect and explain. \nA. 4 years, B. 5 years, C. 2 and half years, D. 3 years', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]