Which of these bones is NOT a part of the human ear?

Femur

The correct answer is Option (3) -Femur

The bone that is NOT a part of the human ear is: Femur

The femur is the thigh bone, which is the longest and strongest bone in the human body. It is not part of the human ear.

The other three options - Malleus, Incus, and Stapes - are collectively known as the ossicles, which are the three smallest bones in the human body and are located in the middle ear. They play a crucial role in the transmission of sound vibrations from the outer ear to the inner ear. Specifically, the malleus (hammer), incus (anvil), and stapes (stirrup) transmit and amplify sound waves received by the ear drum, facilitating hearing.