This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and Development, Subject name: Social & Preventive Medicine
[{'content': 'Height of a newborn doubles at \nSelect and explain. \nA. 2 months, B. 5 months, C. 1 year, D. 4 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Height of a newborn doubles at the age of: 4-4 1/2 years Height increase pattern in children: Age Height increments 1st year 25 cms per year 2nd year 12 cms per year 3rd year 9 cms per year 4th year 7 cms per year 5th year 6 cms per year', 'role': 'assistant'}]