This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Assessment of Growth, Subject name: Pediatrics
Birth length doubles by what age? 
Select and explain. 
A. 1 year, B. 2 years, C. 3 years, D. 4 years
D: 4 years
Answer: D: 4 years 
Explanation: Ans. (d) 4 yearsRef :O.P Ghai 8th ed 15TimeLengthAt birth50cms3 months60cms9 months75 cms2 years90 cms4 years100 cmsIndian children gain 5 cms height every year until 10 years of age.