Question

In the set of terms given below, there is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd term and name the category to which the remaining three belong.

• A. Malleus
• B. Iris
• C. Stapes
• D. Incus

Answer 1

The correct option is B

Iris

The correct option is B.

Explanation of the correct option :

The iris:

1. The iris is a narrow, pigmented structure that controls how much light enters the retina.
2. Iris is the colored component of the eye.
3. It also determines the color of the eyes.

Explanation of the incorrect option:

Option A:

Malleus:

1. The hammer-shaped malleus bone is linked to the tympanic membrane.
2. Category: Ear ossicles.

Option C:

Stapes:

1. The smallest bone in the body is the stapes.
2. It has a stirrup shape and is linked to the cochlea's oval window.
3. Category: Ear ossicles.

Option D:

Incus:

1. Between the malleus and the stapes is the Incus, an anvil-shaped bone.
2. Category: Ear ossicles.

Final answer: The odd one out is Iris.