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': 'Height of the child is double the bih weight at the age of - \nSelect and explain. \nA. 1 year, B. 2 years, C. 4 years, D. 9 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: O.P. Ghai 9th Edition : p. 13 An infant usually doubles his bih height by the age of 4 years.', 'role': 'assistant'}]