Which of the following is not a carpal bone?

The correct answer identifies the calcaneus as it is not a carpal bone. The carpal bones are the eight small bones that make up the wrist, which includes the scaphoid, lunate, and pisiform, among others. The calcaneus, however, is the largest bone in the foot, commonly referred to as the heel bone. It plays a crucial role in supporting the weight of the body and helping with movement and balance while standing and walking. Understanding the distinction between carpal bones, which are crucial for wrist movement and coordination, and the calcaneus, which is part of the foot's structure, is fundamental in anatomy and helps with grasping the broader context of bone classification in the human body.