In Elephant , external nares occur.

Options

A. Adjacent to mouth
B. Sides of trunk
C. Tip of proboscis
D. Base of trunk .

Answer

To answer the question regarding the location of external nares in elephants, we can follow these steps:

1. **Understanding External Nares**: The external nares are the external openings of the nasal passages, which allow air to enter the respiratory system. In elephants, these structures are crucial for breathing, smelling, and even drawing water.

2. **Identifying the Options**: The question provides four options regarding the location of external nares in elephants:
- A) Adjacent to mouth
- B) Side of trunk
- C) Tip of proboscis
- D) Base of trunk

3. **Analyzing Each Option**:
- **Option A (Adjacent to mouth)**: This is not correct as the external nares are not located near the mouth.
- **Option B (Side of trunk)**: This is also incorrect; the external nares are not positioned on the side of the trunk.
- **Option C (Tip of proboscis)**: This option is correct. The external nares in elephants are located at the tip of the proboscis (the trunk).
- **Option D (Base of trunk)**: This is incorrect; the external nares are not found at the base of the trunk.

4. **Conclusion**: After analyzing the options, the correct answer is that the external nares occur at the **tip of the proboscis**.

### Final Answer:
The external nares in elephants occur at the **tip of the proboscis**.