While travelling to higher altitudes, people can feel pain in the ear and dizziness.Which part, among the following is involved ?

Options

A. Cochlea, ear ossicles
B. Tympanic membrane
C. Eustachian tube, utricle, saccule and semicircular canals
D. none of the above

Explanation

To solve the question regarding the discomfort experienced at higher altitudes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Symptoms**: The symptoms mentioned are pain in the ear and dizziness. These symptoms are commonly associated with changes in pressure, which can occur when ascending to higher altitudes.

2. **Identifying Relevant Anatomy**: The ear consists of several parts, including:
- Cochlear ear ossicles
- Tympanic membrane
- Eustachian tube
- Cuticles
- Saccule and semicircular canals

3. **Function of the Eustachian Tube**: The Eustachian tube connects the middle ear to the back of the throat and helps equalize air pressure on both sides of the tympanic membrane. When altitude changes rapidly, the Eustachian tube may not equalize pressure quickly enough, leading to discomfort and pain in the ear.

4. **Role of the Vestibular System**: The vestibular system, which includes the saccule, utricle, and semicircular canals, is responsible for maintaining balance and spatial orientation. Changes in altitude can affect the fluid dynamics within these structures, leading to dizziness.

5. **Conclusion**: Given that both the Eustachian tube and the vestibular system (saccule and semicircular canals) are involved in the symptoms experienced at high altitudes, the correct answer to the question is:
- **Option C: Eustachian tube** (as it is primarily responsible for pressure equalization).

### Final Answer:
**C. Eustachian tube**