Cuvierian glands are connected with

Options

A. Respiratory tree of Sea Cucunber
B. Aristotle's Iantern
C. Eversible stomach of Star Fish
D. Aboral surface of Sea Lily.

Answer

### Step-by-Step Solution:

1. **Understanding Cuvierian Glands**:
- Cuvierian glands are specialized structures found in certain echinoderms, particularly sea cucumbers. They consist of clusters of fine tubes.

2. **Location of Cuvierian Glands**:
- These glands are located at the base of the respiratory tree in sea cucumbers.

3. **Function of Cuvierian Glands**:
- The primary function of Cuvierian glands is defense. When a sea cucumber is threatened by a predator, these glands can expel a sticky substance that can entangle or deter the predator.

4. **Analyzing the Options**:
- **Option A**: Respiratory trachea of sea cucumber - This is where Cuvierian glands are located, making this option likely correct.
- **Option B**: Erythrotal lantern - This is a feeding structure in sea urchins, not related to Cuvierian glands.
- **Option C**: Eversible stomach of starfish - This is a digestive feature of starfish, unrelated to Cuvierian glands.
- **Option D**: Aboral surface of sea lily - This refers to a structural feature for attachment in sea lilies, not related to Cuvierian glands.

5. **Conclusion**:
- Based on the analysis, the correct answer is **Option A: Respiratory trachea of sea cucumber**.