This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Motor Milestones, Subject name: Pediatrics
[{'content': 'A child can make a tower of 6 cubes at the age of? \nSelect and explain. \nA. 36 months, B. 18 months, C. 12 months, D. 24 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A child can make a tower of 6 cubes at 2 years. -tower of 2 cubes at 15 months, 3 cube tower at the age of 18 months', 'role': 'assistant'}]