Eustachian tube connects

Options

A. pharynx with middle ear
B. middle ear with internal ear
C. middle ear with external ear
D. external ear with internal ear

Answer

**Step-by-Step Solution:**

1. **Understanding the Eustachian Tube**: The Eustachian tube is a canal that plays a crucial role in connecting different parts of the ear and the throat.

2. **Identifying the Connection**: The primary function of the Eustachian tube is to connect the middle ear to the nasal pharynx. The middle ear is the air-filled space behind the eardrum, while the nasal pharynx is located at the back of the nasal cavity and the upper throat.

3. **Analyzing the Options**:
- **Option A**: Pharynx with middle ear - This is correct, as the Eustachian tube connects these two structures.
- **Option B**: Middle ear with internal ear - This is incorrect; the internal ear is connected to the middle ear via the oval window, not the Eustachian tube.
- **Option C**: Middle ear with external ear - This is also incorrect; the external ear is connected to the middle ear via the ear canal.
- **Option D**: External ear with internal ear - This is incorrect; there is no direct connection between the external and internal ear.

4. **Conclusion**: Based on the analysis, the correct answer is **Option A: Pharynx with middle ear**.

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