Final answer:
Without a visual aid, it is not possible to determine which arrow points to the lunate, one of the wrist's carpal bones, as the question seems to reference a specific diagram not provided here.
Step-by-step explanation:
The lunate is one of the eight small bones that make up the wrist, which is also known as the carpal bones. Without a visual aid such as a diagram with labeled arrows, it is impossible to accurately identify which arrow points to the lunate. In human anatomy, each carpal bone has a distinct shape and location, and the lunate bone specifically is situated in the center of the proximal row of carpal bones, between the scaphoid and triquetrum bones.
If the question pertains to locating the lunate on a diagram, a reference to the provided diagram is necessary to determine which arrow is pointing to the correct bone. Therefore, without the accompanying visual element, selecting the correct option from A, B, C, or D is not feasible. An accurate and correct response requires the relevant image or context that points out or labels the lunate bone directly.