Dermal branchiae (papulae) present in Star Fish take part in

Options

A. Respiration
B. Excretion
C. Both A and B
D. Producing current of water .

Answer

### Step-by-Step Solution:

1. **Understanding Dermal Branchiae (Papulae)**:
- Dermal branchiae, also known as papulae or skin gills, are specialized structures found in starfish (echinoderms). They are extensions of the coelom and are located on the surface of the starfish.

2. **Function of Dermal Branchiae**:
- The primary functions of dermal branchiae include:
- **Respiration**: They facilitate gas exchange, allowing oxygen to enter the body and carbon dioxide to be expelled.
- **Excretion**: They also play a role in the removal of metabolic waste products from the body.

3. **Analyzing the Options**:
- The question provides multiple-choice options:
- A) Respiration
- B) Excretion
- C) Both A and B
- D) Producing current of water
- Based on the functions of dermal branchiae, both respiration and excretion are correct.

4. **Eliminating Incorrect Options**:
- The option "producing current of water" is incorrect because this function is primarily associated with the water vascular system of starfish, not the dermal branchiae.

5. **Conclusion**:
- Therefore, the correct answer is **C) Both A and B**, as dermal branchiae (papulae) are involved in both respiration and excretion.