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': 'When can a child kick a ball? \nSelect and explain. \nA. 12 months, B. 18 months, C. 24 months, D. 36 months', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. 24 months(Ref: Illingworth's normal and abnormal child)A child can run and kick a ball at 2 years age and can go upstairs and downstairs 2 feet/step.", 'role': 'assistant'}]