This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Height of children in 2–10 years of age is increased by – 
Select and explain. 
A. 2 cm/year, B. 4 cm/year, C. 6 cm/year, D. 10 cm/ year
C: 6 cm/year
Answer: C: 6 cm/year 
Explanation: "After 4 years, the child gains about 5 cm in height every year, until the age of 10 years" -- O.P. Ghai.
"An average child gains approximately 7-8 cm in height between the age of 2-6 years and 6-7 cm in height between
6-12 years".    -- Nelson
Amongst given option, 6 cm/year is the best answer.