Pick out the Wrong statement:

Options

A. Double fertilization is unique to gymnosperms and monocotyledons
B. Sequoia, a gymnosperm is one of the tallest tree
C. Phaeophyceae members possess chlorophyll,c, carotenoids and xanthophylls
D. Moss body is gametophyte which consists of two stages namely protonema stage and leafy stage

Explanation

To solve the question "Pick out the wrong statement," we will analyze each of the provided statements one by one to identify which one is incorrect.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "Double fertilization is unique to gymnosperms and monocotyledons."
- **Analysis**: This statement is incorrect. Double fertilization is a process that occurs in angiosperms (flowering plants), which include both monocots and dicots. Gymnosperms do not undergo double fertilization.

- **Statement 2**: "Sequoia, a gymnosperm, is one of the tallest trees."
- **Analysis**: This statement is correct. Sequoia trees are indeed gymnosperms and are known for their impressive height.

- **Statement 3**: "Phaeophyceae members possess chlorophyll C, carotenoids, and xanthophylls."
- **Analysis**: This statement is correct. Phaeophyceae, or brown algae, contain chlorophyll C along with other pigments like carotenoids and xanthophylls.

- **Statement 4**: "Moss bodies gametophyte which consist of two stages namely protonema stage and leafy stage."
- **Analysis**: This statement is correct. The gametophyte stage of mosses does indeed consist of the protonema stage and the leafy stage.

2. **Conclusion**:
- The only incorrect statement among the options is the first one: "Double fertilization is unique to gymnosperms and monocotyledons."

### Final Answer:
The wrong statement is: **"Double fertilization is unique to gymnosperms and monocotyledons."**

---