Question

Mark the odd item in each series:

Incus; stapes; retina; malleus.

Answer 1

1. Incus: Incus is also known as an anvil. Incus is the middle bone of the three ossicles present in the middle ear.
2. Stapes: It is also known as the stirrup the third bone of the three ossicles present in the middle ear.
3. Retina: The retina is the light-sensitive layer bearing photoreceptors present in the inner coat of the eye.
4. Malleus: Malleus, also called hammer is the first bone of the three ear ossicles present in the middle ear.

The retina is the odd term out as it is a layer present in the eye, unlike the other three parts which make up the ear ossicles.