<prompt> The closest pre-pubeal increase in height each year is1-2cm3-4cm5-7cm8-10cm  <response>: Length at bih - 50cms At the end of 1st year-75 cms Increase in length is 25cmyr -1st year of bih At the end of 4yrs - 100cm. From there on till 12 yrs i.e, pre pubeal age increase in height is 6cm per year. There is marked acceleration in height during pubey. Ref- Ghai , Chapter 2 