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 regarding the incorrect statements about a monocot stem, we will analyze each statement provided and identify the correct one.

### Step-by-Step Solution:

1. **Understanding the Structure of Monocot Stem**:
- Monocot stems have a unique structure that differentiates them from dicots. They typically have scattered vascular bundles and do not have distinct regions like cortex, pith, and pericycle.

2. **Analyzing Each Statement**:
- **Statement 1**: "Hypodermis of monocot stem is made up of multiple layers of parenchyma."
- This statement is **incorrect**. The hypodermis of a monocot stem is primarily made up of sclerenchyma, which provides strength and support, not parenchyma.

- **Statement 2**: "Vascular bundles are surrounded by sclerenchymatous bundle sheath."
- This statement is **correct**. In monocot stems, the vascular bundles are indeed surrounded by a layer of sclerenchymatous cells known as the bundle sheath.

- **Statement 3**: "Vascular bundles are surrounded by a parenchymatous pericycle in the monocot stem."
- This statement is **incorrect**. In monocots, the vascular bundles are surrounded by the endodermis, not a parenchymatous pericycle.

- **Statement 4**: "Peripheral vascular bundles are generally larger than the centrally located ones."
- This statement is **incorrect**. Typically, the peripheral vascular bundles are smaller than the central ones.

3. **Conclusion**:
- After analyzing all statements, the only correct statement about monocot stems is **Statement 2**: "Vascular bundles are surrounded by sclerenchymatous bundle sheath."

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