Cell wall is
A. A non-living, rigid structure that surrounds the plasma membrane of plant cell.
B. Fungal cell wall is composed of N-acetylglucosamine units.

Options

A. Only A is correct
B. Only B is incorrect
C. Only A is incorrect
D. Both A and B are correct

Answer

To solve the question regarding the cell wall, we will analyze both statements provided and determine their correctness.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- The statement claims that the cell wall is "a non-living, rigid structure that surrounds the plasma membrane of plant cells."
- This is correct. The cell wall is indeed a non-living structure that provides rigidity and support to the plant cell. It surrounds the plasma membrane and is crucial for maintaining the shape of the cell.

2. **Analyze Statement B**:
- The statement claims that "the fungal cell wall is composed of N-acetylglucosamine units."
- This is also correct. The cell wall of fungi is primarily made up of chitin, which is a polymer that includes N-acetylglucosamine units. This component is vital for the structural integrity of fungal cells.

3. **Conclusion**:
- Both statements A and B are correct. Therefore, the correct answer to the question is that both statements accurately describe aspects of the cell wall.

### Final Answer:
Both statements A and B are correct regarding the cell wall.

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