A mollusc in which the detached body gets coiled like a millipede is

Options

A. Turbinella
B. Neopilina
C. Chiton
D. Helix

Answer

To solve the question "A mollusc in which the detached body gets coiled like a millipede is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**:
- We need to identify a specific type of mollusc that exhibits a coiling behavior when detached from its substrate.

2. **Analyze the Options**:
- The options provided are:
1. Turbillina
2. Neopilina
3. Chiton
4. Helix

3. **Research Each Option**:
- **Turbillina**: This is not known for coiling behavior. It is a type of flatworm, not a mollusc.
- **Neopilina**: This is a type of monoplacophoran mollusc, but it does not exhibit coiling behavior when detached.
- **Chiton**: This is a marine mollusc known for its oval shape and polyplacophoran structure. When detached from its substrate, its body can coil up.
- **Helix**: This refers to a genus of land snails, which do not exhibit the coiling behavior described in the question.

4. **Identify the Correct Answer**:
- Based on the analysis, the correct answer is **Chiton**. This mollusc is known for its ability to coil when detached from its substrate.

5. **Final Confirmation**:
- The question specifically asks for a mollusc that coils like a millipede when detached, and Chiton fits this description perfectly.

### Conclusion:
- The correct answer to the question is **Chiton** (Option 3).

---