Question

which is an axial bone?
a. ulna
b. phalanges
c. fibula
d. vertebra

Explanation:

The axial skeleton includes the skull, vertebral column (vertebrae), and rib - cage. The ulna, phalanges, and fibula are part of the appendicular skeleton. The ulna is in the forearm, phalanges are in the fingers and toes, and the fibula is in the lower leg. So, the vertebra is the axial bone among the given options.

Answer:

D. Vertebra