Chla + Chld + r-phycoerythrin are the pigments in the members of -

Options

A. Rhodophyceae
B. Phaeophyceae
C. Chlorophyceae
D. Cyanophyceae

Answer

To determine which group of algae contains the pigments Chlorophyll A, Chlorophyll D, and R-Phycoerythrin, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Pigments**: The pigments in question are Chlorophyll A, Chlorophyll D, and R-Phycoerythrin.

2. **Classify the Algae**: Algae are classified into different groups based on their pigments:
- **Rhodophyceae (Red Algae)**: Contains Chlorophyll A and D, and R-Phycoerythrin.
- **Pheophyceae (Brown Algae)**: Contains Chlorophyll A and C, and Fucosanthin.
- **Chlorophyceae (Green Algae)**: Contains Chlorophyll A and B.
- **Cyanophyceae (Blue-Green Algae)**: These are prokaryotic and contain chlorophyll but are not classified as true algae.

3. **Analyze the Pigment Composition**:
- Since R-Phycoerythrin is a pigment that gives red algae their characteristic color, we can conclude that the presence of Chlorophyll A and D along with R-Phycoerythrin indicates that we are dealing with red algae.

4. **Conclusion**: Therefore, the correct answer is that Chlorophyll A, Chlorophyll D, and R-Phycoerythrin are pigments found in **Rhodophyceae**, which is the class of red algae.

### Final Answer:
Chlorophyll A, Chlorophyll D, and R-Phycoerythrin are the pigments in the members of **Rhodophyceae** (Red Algae).