In which of the following group all the orgaisms contain phycobilins?

Options

A. Anabaena,Gelidium,Nereocystis,Zoochlorella
B. Nostoc,Porphyra,Chondrus,Batrachospermum
C. Oscillatoria,Sargassum,Volvox,Fucus
D. None of the above.

Answer

To determine which group of organisms contains phycobilins, we need to analyze the options provided and identify which of them includes organisms known to possess these pigments.

### Step-by-Step Solution:

1. **Understanding Phycobilins**:
- Phycobilins are water-soluble pigments found in certain algae. They are primarily present in the cytoplasm or stroma of chloroplasts and are characteristic of two main groups: cyanobacteria (blue-green algae) and rhodophyta (red algae).

2. **Analyzing the Options**:
- **Option 1**: Anabina, Gelidium, Nereocystis, Zoochlorilla
- Anabina is a cyanobacterium, but Gelidium (a red algae) and Nereocystis (a brown algae) do not contain phycobilins. Zoochlorilla is not a recognized group that contains phycobilins.

- **Option 2**: Nostoc, Porphyra, Chondrus, Batrachospermum
- Nostoc is a cyanobacterium, Porphyra (red algae), Chondrus (red algae), and Batrachospermum (red algae) all contain phycobilins. This group consists entirely of organisms that possess phycobilins.

- **Option 3**: Oscillatoria, Sargassum, Volvox, Fucus
- Oscillatoria is a cyanobacterium, but Sargassum (brown algae), Volvox (green algae), and Fucus (brown algae) do not contain phycobilins.

- **Option 4**: None of the above
- This option can be dismissed as we have already identified a group that contains phycobilins.

3. **Conclusion**:
- The only group where all organisms contain phycobilins is **Option 2: Nostoc, Porphyra, Chondrus, Batrachospermum**.

### Final Answer:
**Option 2: Nostoc, Porphyra, Chondrus, Batrachospermum**