This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Pincer grasp develops at: \nSelect and explain. \nA. 5-7 months, B. 9-12 months, C. 1-2 years, D. 8-9 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (9-12 months) (46-G) (28-Ghai 7th)* Palmar grasp - by 7 months* Pincer grasp with the index finger and thumb apposition is acquired by 9 - 10 months* He can transfer objects from one hand to the other by 5 - 7 month.* Imitates scribblang : tower of 2 blocks - 15 months* Scribbles : tower of 3 blocks - 18 month', 'role': 'assistant'}]