This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Handedness develops at – \nSelect and explain. \nA. 12 months, B. 18 months, C. 24 months, D. 36 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Handedness is usually established by the 3rd year.', 'role': 'assistant'}]