This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Developmental-Behavioral Screening and Surveillance, Subject name: Pediatrics
[{'content': 'Children can reach for objects by: \nSelect and explain. \nA. 4 months, B. 6 months, C. 8 months, D. 10 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (4 months) Ref: Nelson Textbook of Pediatrics, 19th edition. Pg 27. Explanation: (See following table) Fine motor milestones MilestoneAverage age of attainment (in months)Developmental implicationsGrasps rattle3.5Object useReaches for objects4Visuomotor coordinationPalmar grasp gone4Voluntary releaseTransfers object hand to hand5.5Comparison of objectsThumb-finger grasp8Able to explore small objectsTurns pages of book12Increasing autonomy during book timeScribbles13Visuomotor coordinationBuilds tower of 2 cubes15Uses objects in combinationBuilds tower of 6 cubes22Requires visual, gross, and fine motor coordination', 'role': 'assistant'}]