Which of the following belongs to Rhodophyta ?

Options

A. Polysiphonia
B. Sphagnum
C. Polytichum
D. Dictyota

Answer

To determine which of the given options belongs to the group Rhodophyta, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Rhodophyta**:
- Rhodophyta, also known as Rhodophyceae, is a group of red algae. They are characterized by their chlorophyll content and are primarily aquatic organisms.

2. **Identify the Options**:
- The options provided are:
- A) Polysiphonia
- B) Sphagnum
- C) Polytrichum
- D) Dictyota

3. **Classify the Options**:
- **Polysiphonia**: This is a type of red algae and belongs to Rhodophyta.
- **Sphagnum**: This is a genus of mosses, not algae.
- **Polytrichum**: This is also a genus of mosses, not related to algae.
- **Dictyota**: This is a genus of brown algae, belonging to the class Phaeophyceae.

4. **Conclusion**:
- From the analysis, the only option that belongs to Rhodophyta is **Polysiphonia**.

### Final Answer:
- The correct answer is **A) Polysiphonia**.