<prompt> The normal gain in length in a full term baby, at first 6 months of life is:6 cm9 cm15 cm24 cm  <response>: c. 15cmRef: Nelsons 20e p 84-89, Ghai 8e p 13-14Lengthatbirth50cmLengthat3months60cm;So,gaininlengthin3months60-5010cmLengthat9months70cm;So,gaininlengthin9months70-5020cmSo, gain in length in 6 months is between 10and20cm, so 15cm is the best answer. 