Total no.of hearts in Pheretima is 

Options

A. 4
B. 6
C. 8
D. 10

Answer

To determine the total number of hearts in Pheretima (commonly known as earthworm), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Anatomy of Pheretima**:
- Pheretima has a unique circulatory system that includes a series of aortic arches.

2. **Identify the Aortic Arches**:
- In Pheretima, there are five pairs of aortic arches. Each pair consists of two arches.

3. **Calculate the Total Number of Aortic Arches**:
- Since there are five pairs, we multiply the number of pairs by 2 (as each pair has two arches).
- Total aortic arches = 5 pairs × 2 = 10 aortic arches.

4. **Define the Aortic Arches as Hearts**:
- In the context of this question, each aortic arch functions similarly to a heart. Therefore, the total number of hearts in Pheretima can be equated to the total number of aortic arches.

5. **Conclusion**:
- Thus, the total number of hearts in Pheretima is 10.

### Final Answer:
The total number of hearts in Pheretima is **10**.

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