The blue colour of snail is due to presence o

Options

A. Albumin
B. Haemocyanin
C. Globulins
D. Fibrinogen

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks what causes the blue color of snails.

2. **Consider Possible Options**: The options provided are albumin, hemocyanin, globulins, and fibrinogen.

3. **Understand Hemocyanin**: Hemocyanin is a respiratory pigment found in some invertebrates, including snails. It contains copper ions.

4. **Role of Copper in Color**: The blue color of hemocyanin is due to the presence of copper. When oxygen binds to hemocyanin, it changes color, resulting in a blue appearance.

5. **Conclusion**: Since hemocyanin is responsible for the blue color in snails due to its copper content, the correct answer is hemocyanin.

6. **Final Answer**: The blue color of the snail is due to the presence of hemocyanin.