Question

Give below are sets with four terms each. In each set is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd one in each set and name the category to which the remaining three belong Malleus, Pinna, Incus, Stapes

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

Answer 1

The correct option is B

Pinna

The correct option is option B:

Explanation of the correct option:

1. Pinna is the outer ridged cartilaginous part of the external ear covered with skin.
2. Though the pinna sound waves are received from the external environment.

Explanation of the incorrect options:

Option A:

1. Malleus is the first ear ossicle of the middle ear.
2. This is a tiny hammer-shaped bone.
3. One end of this bone is connected to the tympanum and another end is connected to the incus.

Option C:

1. Incus is the 2nd ear ossicle.
2. It is a tiny anvil-shaped bone.
3. One end of this bone is connected to the malleus and the other end is connected to the stapes.

Option D:

1. Stapes is the 3rd ear ossicle.
2. It is a tiny stirrup-shaped bone.
3. Stapes is the smallest human bone.
4. One end of this bone is connected to the incus and the other end is connected to the oval window of the inner ear.

Final answer:

Hence, According to the given question, the odd term is Pinna(Part of the external ear) & the rest of the terms are associated with the ear ossicles( These are the three bones -malleus, incus & stapes present in the tympanic cavity of the middle ear).