Bih length doubles by what age?: (A) 1 year, (B) 2 years, (C) 3 years, (D) 4 years
Answer is D. Bih length doubles by 4- 4 1/2 yrs of age Age Bih 1 year 2 year 4 year 12 year Height 50 cm 75 cm 90 cm 100 cm 150 cm Length of child increases by 50% in 1st year.