Broken arms are regenerated in

Options

A. Echinoderms
B. Molluscs
C. Human beings
D. Fishes

Answer

To answer the question "Broken arms are regenerated in", we need to analyze the options provided: echinoderms, mollusks, human beings, or fishes.

### Step-by-Step Solution:

1. **Understanding Regeneration**:
- Regeneration is the process by which organisms can replace or restore lost or damaged body parts. This ability varies significantly among different groups of organisms.

2. **Identifying Echinoderms**:
- Echinoderms, such as starfish and sea cucumbers, are well-known for their remarkable regenerative capabilities. They can regenerate lost arms and other body parts.

3. **Considering Mollusks**:
- Mollusks, which include snails, clams, and octopuses, have some regenerative abilities, but they are not as proficient as echinoderms in regenerating limbs.

4. **Evaluating Human Beings**:
- Humans have limited regenerative capabilities. While we can heal wounds and regenerate some tissues (like liver cells), we cannot regenerate limbs or arms.

5. **Looking at Fishes**:
- Some fish can regenerate fins and scales, but they do not have the ability to regenerate limbs like echinoderms do.

6. **Conclusion**:
- Based on the analysis, the correct answer is that broken arms are regenerated in **echinoderms**.

### Final Answer:
Broken arms are regenerated in **echinoderms**.

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