Question

Given below are two sets with four terms each. In each set, a term 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.

(i) Semicircular canal, cochlea, tympanum, utriculus.

Answer 1

Odd term: Tympanum

1. It is the part of the external ear.
2. It is commonly known as eardrums.
3. It is attached to the malleus of the middle ear.
4. Rupturing of the eardrum can cause deafness.

Category of other three terms: they belong to the part of the inner ear.

1. There are three semi-circular canals in each ear and it is responsible for the dynamic balance of the body.
2. The Organ of Corti of the cochlea is concerned with hearing.
3. Utriculus is the part of the vestibule of the inner ear and is responsible for the static balance of the body.

Final answer: The odd term is tympanum which is a part of the middle ear and the category of the other terms is ‘parts of the inner ear’.