Name the locomotory organs in three classes of phylum Annelida.

Explanation

### Step-by-Step Solution:

1. **Identify the Phylum**: The question pertains to the phylum Annelida, which is known for its segmented worms.

2. **Classify the Phylum**: Annelida is divided into three main classes:
- Oligochaeta
- Polychaeta
- Hirudinea
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