This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal System, Subject name: Radiology
Number of carpal bones seen in a radiograph of an infant is: 
Select and explain. 
A. 0, B. 2, C. 3, D. 5
B: 2
Answer: B: 2 
Explanation: b) 2 ref: Sutton 7th/e p. 1848 fig A3