Walls of sclerenchyma are
(a) Rigid
(b) Lignified
(c) Pectinized
(d) Suberized

Options

A. Rigid
B. Lignified
C. Pectinized
D. Suberized

Answer

To answer the question regarding the walls of sclerenchyma, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sclerenchyma**: Sclerenchyma is a type of plant tissue composed of dead cells that provide structural support.

2. **Characteristics of Sclerenchyma Cells**: These cells have thick and tough secondary walls in addition to their primary walls.

3. **Composition of the Walls**: The secondary walls of sclerenchyma cells are primarily composed of lignin, which is a complex organic polymer that adds rigidity and strength to the cell walls.

4. **Function of Sclerenchyma**: Due to their lignified walls, sclerenchyma cells serve as a supportive and mechanical tissue in plants. They are not flexible, which is essential for their role in providing structural support.

5. **Analyzing the Options**:
- (a) Rigid: This is true, as sclerenchyma cells are rigid due to their thick walls.
- (b) Lignified: This is also true, as the secondary walls are specifically made of lignin.
- (c) Pectinized: This is incorrect; sclerenchyma walls are not primarily composed of pectin.
- (d) Suberized: This is also incorrect; suberization refers to the presence of suberin, which is not a characteristic of sclerenchyma.

6. **Conclusion**: The most accurate description of the walls of sclerenchyma is that they are lignified. Therefore, the correct answer is (b) Lignified.

### Final Answer:
(b) Lignified

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