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': 'When does a child attain this impoant fine motor milestone? \nSelect and explain. \nA. 3 months, B. 6 months, C. 9 months, D. 12 months', 'role': 'user'}, {'content': "Answer: D \nExplanation: The given picture shows 'mature pincer grasp' which develops at 12 month. 6 months Unidextrous or palmar grasp 7 months Transfer objects from 1 hand to another 9 months immature/ assisted pincer grasp 12 months mature/unassisted pincer grasp- 'CASTING'", 'role': 'assistant'}]