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
[{'content': 'Average gain of Height in the first year is? \nSelect and explain. \nA. 25 cm, B. 50 cm, C. 75 cm, D. 100 cm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Square root of the month of the baby. Till he reaches 7 months Ref- OP. Ghai ,9th edition, Page 14', 'role': 'assistant'}]