Question

Given below is the set with four terms. With one odd term that cannot be grouped in the same category to which the other three belong. Identify the odd one and name the category to which the remaining three belong.

• A. Semicircular canals
• B. Cochlea
• C. Tympanum
• D. Utriculus

Answer 1

The correct option is C

Tympanum

The correct option is C.

Explanation of the correct option:

1. The tympanum or eardrum or tympanic membrane is a thin membrane.
2. The tympanum is a part of the ear that separates the middle ear from the outer ear.
3. The tympanum starts vibrating when sound waves reach it.
4. It is not a part of internal ear.

Explanation of the incorrect options:

Option A:

Semicircular canals are the set of three interrelated tubes positioned in the internal ear.

Option B:

The cochlea is a part of the internal ear and a coiled portion of the labyrinth with about two and a half turns.

Option D:

Utriculus is a sensory cell located in the semicircular canal and is responsible for the static equilibrium of the body. It is also a part of internal ear.

Final answer: The odd one out is tympanum.