Phycoerythrin is the major pigment in:

Options

A. Red Algae
B. Blue green algae
C. green algae
D. brown algae

Answer

To solve the question "Phycoerythrin is the major pigment in:", we will analyze the options provided and determine where phycoerythrin is predominantly found.

### Step-by-Step Solution:

1. **Understanding Phycoerythrin**:
- Phycoerythrin is a pigment that gives a red color appearance. It is important to identify which group of algae contains this pigment.

2. **Analyzing the Options**:
- **Red Algae**: Known scientifically as Rhodophyceae, red algae are characterized by the presence of phycoerythrin. This pigment is responsible for their red coloration.
- **Brown Algae**: These algae contain pigments like fucoxanthin and xanthophyll, which give them a brownish color. They do not contain phycoerythrin.
- **Green Algae**: Green algae primarily contain chlorophyll, which gives them a green color. They do not have phycoerythrin.
- **Blue-Green Algae**: Also known as cyanobacteria, these organisms contain chlorophyll and phycocyanin, which gives them a blue color. They do not contain phycoerythrin.

3. **Conclusion**:
- Since phycoerythrin is the major pigment that gives a red color appearance and is predominantly found in red algae (Rhodophyceae), the correct answer is **Red Algae**.

### Final Answer:
Phycoerythrin is the major pigment in **Red Algae**.

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