<prompt> Upper segment: lower segment ratio in 3 year old child -1?1:11?5:11?3:11?7:1  <response>: Ans. is c i.e., 1.3:1IAPText book of Paediatricp. 29At birth1.7:13 to 4 years 1.3:18 - 9 years1:118 years 0.9:8 Upper segment Vertex to pubic symphysis.Lower segment Pubic symphysis to sole feet.Wt estimationAt birth 3.2keHt. EstimationBirth 50 cm.1 year 75 cm. 2-12 years Age x 6 77 cm 