All of the following statements are incorrect about a monocot stem, except

Options

A. hypodermis of monocot stem is made up of multiple layers of parenchyma
B. Vascular bundles are surrounded by sclerenchymatous bundle sheath.
C. the vascular cylinder is surrounded by a parenchymatous pericycle in monocot stem
D. peripheral vascular bundles are generally larger than the centrally located ones.

Answer

To solve the question, we need to analyze the statements provided about monocot stems and identify which one is correct among the incorrect statements.

### Step-by-Step Solution:

1. **Understanding Monocot Stems**:
- Monocot stems have specific structural features that differentiate them from dicot stems. They typically have scattered vascular bundles and a lack of secondary growth.

2. **Evaluating Statement 1**:
- "Hypodermis of the monocot stem is made up of multiple layers of parenchyma."
- This statement is **incorrect** because the hypodermis in monocot stems is generally made up of sclerenchyma, not parenchyma.

3. **Evaluating Statement 2**:
- "Vascular bundles are surrounded by the sclerenchymatous bundle sheath."
- This statement is **correct**. In monocot stems, the vascular bundles are indeed surrounded by a bundle sheath made of sclerenchyma.

4. **Evaluating Statement 3**:
- "The vascular cylinder is surrounded by the parenchymal test paracycle in monocot stem."
- This statement is **incorrect**. The vascular cylinder in monocots does not have phloem parenchyma, and the surrounding tissue is not parenchymal.

5. **Evaluating Statement 4**:
- "The peripheral vascular bundles are generally larger than the centrally located one."
- This statement is also **incorrect**. In monocots, the vascular bundles are typically scattered and do not follow a pattern where peripheral bundles are larger than central ones.

6. **Conclusion**:
- The only correct statement among the options provided is **Statement 2**, which states that vascular bundles are surrounded by the sclerenchymatous bundle sheath.

### Final Answer:
The correct statement about a monocot stem is: **"Vascular bundles are surrounded by the sclerenchymatous bundle sheath."**

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