This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'A child can ride a tricycle, copy a circle and knows age sex by the age of – \nSelect and explain. \nA. 30 months, B. 42 months, C. 36 months, D. 48 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]