This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Average gain of height in first year ? \nSelect and explain. \nA. 25 cms, B. 50 cms, C. 75 cms, D. 100 cms', 'role': 'user'}, {'content': 'Answer: A \nExplanation: O.P. Ghai 9th Edition - page 13', 'role': 'assistant'}]