Torus is composed of :–

Options

A. Suberin
B. Chitin
C. Cutin
D. Lignin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what the "torus" is composed of. The torus is a specific structure found in certain plant cells, particularly in relation to the xylem.

2. **Identifying the Torus**: The torus is described as a thickened part of the stem, specifically the receptacle from which the parts of flowers and fruits grow. It plays a role in the structure of the xylem.

3. **Analyzing the Options**: The options given are:
- 1. Suberin
- 2. Chitin
- 3. Cutin
- 4. Lignin

4. **Evaluating Each Option**:
- **Suberin**: This is a hydrophobic material that prevents water from penetrating tissues. It is found in the endodermal cell walls of roots. This is the correct answer as it is associated with the torus structure.
- **Chitin**: A polysaccharide found in the exoskeletons of arthropods. This does not relate to the torus.
- **Cutin**: A waxy substance found in the cuticle of plants, but it is not related to the torus.
- **Lignin**: A complex organic polymer found in the cell walls of plants, mainly providing structural support, but it is not the composition of the torus.

5. **Conclusion**: Based on the analysis, the correct answer is **Suberin** (Option 1).

**Final Answer**: The torus is composed of Suberin.

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