Proboscis is the

Options

A. (a) labium
B. (b) labrum-epipharynx
C. (c) hypopharynx
D. (d) all of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Proboscis":**
- The proboscis is defined as an elongated structure that protrudes from the head of an organism. It is primarily associated with feeding mechanisms.

2. **Identifying the Presence in Organisms:**
- Proboscis is found in both invertebrates and vertebrates. In invertebrates, it is often adapted for sucking and feeding, while in vertebrates, it can refer to parts of the nose or snout.

3. **Analyzing the Example Given:**
- The example of a butterfly is used to illustrate the concept of a proboscis. The mouthparts of a butterfly include various structures, among which the proboscis plays a significant role.

4. **Identifying the Specific Structures:**
- In the context of the butterfly, the structures mentioned include the labium and labrum. The proboscis is formed by the extension of the labrum epipharynx.

5. **Conclusion:**
- Based on the information provided, the correct identification of the proboscis in the context of the butterfly's mouthparts is the labrum epipharynx. Therefore, the correct answer is option B: lab epipharynx.

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