Which of these is NOT a bone in the human body?

Correct option is D

The correct answer is (d) Axe.
Axe: This is not a bone in the human body. An axe is a tool used for chopping wood, splitting timber, and other related tasks. It has no anatomical relevance to the human body.
Additional Information:
· Anvil : Also known as the incus, the anvil is one of the three tiny bones, or ossicles, located in the middle ear. It transmits sound vibrations from the malleus (hammer) to the stapes (stirrup).
· Hammer : Also known as the malleus, the hammer is another one of the three ossicles in the middle ear. It receives vibrations from the tympanic membrane (eardrum) and transmits them to the incus (anvil).
· Stirrup : Also known as the stapes, the stirrup is the third of the ossicles in the middle ear. It transmits sound vibrations from the incus to the oval window of the cochlea, facilitating hearing.