Photosynthetic pigment capable of absorbing green light is

Options

A. Phycocyanin
B. Carotenoid
C. Phycoerythrin
D. Chlorophyll.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a photosynthetic pigment that can absorb green light. This requires knowledge of different pigments and their absorption spectra.

2. **Analyzing the Options**:
- **Option 1: Phycocyanine**: This pigment is known to be light blue and primarily absorbs orange and red light. Therefore, it does not absorb green light.
- **Option 2: Carotenoids**: These pigments are responsible for yellow, orange, and red colors in plants. They act as accessory pigments and photoprotective agents but do not absorb green light effectively.
- **Option 3: Phycoerythrine**: This is a red pigment found in red algae. It is an accessory pigment that helps in light absorption, specifically capable of absorbing green light due to its role in the phycobiliprotein complex.
- **Option 4: Chlorophyll**: This pigment is crucial for photosynthesis and gives plants their green color. However, chlorophyll primarily absorbs blue and red light, not green.

3. **Identifying the Correct Answer**: Based on the analysis, phycoerythrine is the pigment that can absorb green light, particularly in red algae. Therefore, the correct answer is **phycoerythrine**.

### Final Answer:
The photosynthetic pigment capable of absorbing green light is **phycoerythrine**.

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