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': 'Mature finger grip comes at the age of ___ months. \nSelect and explain. \nA. 5, B. 7, C. 9, D. 12', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Nelson 20th edition, page 66 Grasping object between thumb and index finger (pincer grasp) develops by 9 months.', 'role': 'assistant'}]