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
Average gain of Height in the first year is? 
Select and explain. 
A. 25 cm, B. 50 cm, C. 75 cm, D. 100 cm
A: 25 cm
Answer: A: 25 cm 
Explanation: Square root of the month of the baby. Till he reaches 7 months Ref- OP. Ghai ,9th edition, Page 14