Birth length doubles by what age?: (A) 1 year, (B) 2 years, (C) 3 years, (D) 4 years
Answer is D. 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.