At the end of 1 year of age, the number of carpal bones seen in the skiagram of the hand is ___________

**Core Concept**
The carpal bones in the human wrist are a group of eight small bones that develop and ossify at different stages of fetal development and early childhood. The process of ossification is crucial in determining the number of visible carpal bones in a radiograph at different ages.

**Why the Correct Answer is Right**
At the end of 1 year of age, most of the carpal bones have started to ossify, but some are still in the process of development. The number of visible carpal bones in a radiograph at this age is typically between 3 to 5. This is because the capitate, hamate, and the triquetrum bones are usually visible, while the others like the lunate, scaphoid, and the pisiform are still in the early stages of ossification. The radiographic appearance of the carpal bones at this age is essential in diagnosing developmental disorders and assessing the growth and development of the hand.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect because it is a vague answer and does not provide any specific information about the number of carpal bones visible at the end of 1 year of age.
* **Option B:** This is incorrect because it is a higher number than what is typically expected at the end of 1 year of age. More than 5 carpal bones visible at this age may indicate an abnormality in bone development.
* **Option C:** This is incorrect because it is a lower number than what is typically expected at the end of 1 year of age. Fewer than 3 carpal bones visible at this age may indicate a developmental delay or abnormality.

**Clinical Pearl / High-Yield Fact**
The carpal bones develop and ossify at different stages of fetal development and early childhood. A radiograph of the hand at different ages can provide valuable information about the growth and development of the hand and help in diagnosing developmental disorders.

**Correct Answer:** C. 3-5.