Ventral surface of earthworm is marked by the presence of -

Options

A. Digestive canal
B. Blood vessel
C. Genital pores
D. Hearts

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the specific feature that marks the ventral surface of an earthworm. The ventral surface is the underside of the earthworm, which is important for identifying various structures.

2. **Analyzing the Options**: The options given are:
- A) Digestive canal
- B) Blood vessel
- C) Genital pores
- D) Heart

3. **Identifying the Ventral Surface**: In earthworms, the ventral surface is characterized by certain features. The ventral side is where the genital pores are located, which are crucial for reproduction.

4. **Understanding Genital Pores**: Genital pores are the common external openings for the reproductive systems of both male and female earthworms. They are located on the ventral side, making them a key identifying feature.

5. **Conclusion**: Based on the analysis, the correct answer to the question is option C) Genital pores. These pores are specifically noted as marking the ventral surface of the earthworm.

### Final Answer:
C) Genital pores

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