This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
The closest pre-pubeal increase in height each year is 
Select and explain. 
A. 1-2cm, B. 3-4cm, C. 5-7cm, D. 8-10cm
C: 5-7cm
Answer: C: 5-7cm 
Explanation: Length at bih - 50cms At the end of 1st year-75 cms Increase in length is 25cm/yr -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