Odd One Out — From EARS, VESTIBULAR, NOSE, and EYES, select the term that does not directly name a primary sense organ.

Introduction / Context:
This item distinguishes between organ names and a physiological system term. Three options name sense organs; one names a system related to balance.

Given Data / Assumptions:

• EARS, NOSE, EYES: names of sense organs.
• VESTIBULAR: refers to the vestibular system (balance), part of the inner ear apparatus but not itself an organ name.

Concept / Approach:
Classify each option as an organ vs a system or function descriptor.

Step-by-Step Solution:
EARS: organ.EYES: organ.NOSE: organ.VESTIBULAR: system label, not an organ name.

Verification / Alternative check:
The vestibular system contributes to balance and spatial orientation; it is not a distinct organ like eye, ear, or nose as named.

Why Other Options Are Wrong:

• EARS: organ name, not the outlier.
• EYES: organ name, not the outlier.
• NOSE: organ name, not the outlier.

Common Pitfalls:
Assuming vestibular equals ears; the term names a system, not the organ itself.

Final Answer:
VESTIBULAR