In earthworm, haemoglobin is present in the dissolved state in

Options

A. Lymph
B. bile
C. Plasma
D. Blood corpuscles

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks where hemoglobin is found in a dissolved state in earthworms.

2. **Identifying Key Components**: In earthworms, there are specialized structures known as blood glands located in segments 4, 5, and 6. These glands are responsible for producing blood cells and hemoglobin.

3. **Examining the Options**:
- **Option A: Lymph** - Lymph does not contain hemoglobin; it is a fluid that helps in the immune response and does not carry oxygen.
- **Option B: Bile** - Bile is involved in digestion and does not contain hemoglobin.
- **Option C: Plasma** - Blood plasma is the liquid component of blood and in earthworms, hemoglobin is indeed found dissolved in this plasma.
- **Option D: Blood Corpuscles** - While blood corpuscles (like red blood cells in humans) typically contain hemoglobin, in earthworms, hemoglobin is not contained within blood cells but is dissolved in the plasma.

4. **Conclusion**: The correct answer to the question is that hemoglobin in earthworms is present in a dissolved state in **blood plasma**.

### Final Answer:
Hemoglobin in earthworms is present in dissolved state in **blood plasma**.

---