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': 'You order a wrist X-RAY for a 2 months old child. Which carpal bone are u expecting to be present \nSelect and explain. \nA. Capitate, B. Scaphoid, C. Lunate, D. Trapezoid', 'role': 'user'}, {'content': "Answer: A \nExplanation: At bih, there is no calcification in the carpal bones. Although there is great individual variability, approximate ossification times are as follows. Capitate- 1-3 months Hamate- 2-4 months Triquetrum- 2-3 yrs Lunate- 2-4 yrs Scaphoid- 4-6 yrs Trapezium- 4-6 yrs Trapezoid- 4-6 yrs Pisiform- 8-12 yrs Ref: Nelson's 20th edition, page 3241", 'role': 'assistant'}]